| GA | Georgia R.R. Co. | 4/38-10/66 & 1/75-1/80; eliminated 1/83 |
| Seaboard System R.R., Inc. | added 1/83; eliminated 7/87 | |
| CSX Transportation | added 7/87 | |
| Norfolk Southern Transportation, Inc. | Jan-94 | |
| CSX Transportation | Jul-00 | |
| GAAB | Georgia & Alabama Division, South Carolina Central R.R. Co., Inc. | added 10/89; 1/94; eliminated 7/97; 7/2000 |
| GABX | General American Transportation Corp. | 1/52-4/61 |
| General American Marks Co. | Jul-00 | |
| GACX | General American Transportation Corp. | 4/38-1/94; eliminated 1/98 |
| General American Marks Co. | added 1/98; 7/2000 | |
| GAEX | General American-Evans Co. | 1/52-4/61; eliminated 4/62 |
| General American Transportation Corp. | added 4/62; 7/65-1/80; eliminated 1/88; 1/94 | |
| General American Marks Co. | 7/2000; added 10/2000 | |
| GAFX | General American Transportation Corp. | added 7/75; 1/80 |
| Fuller Co. | 1/94-7/2000 | |
| GAHX | Geo. A. Hormel & Co. (North American Car Corp.) | Apr-38 |
| GALX | Gas Liquids, Inc. | added 10/60; 4/61-10/66; eliminated 1/69 |
| Falley Petroleum Co. | added 1/69; eliminated 4/69 | |
| Falley Corp. | added 4/69; eliminated 7/69 | |
| Georgia Power Co. | added 4/86; 1/94-7/2000 | |
| GAMX | General American Transportation de Mexico, S.A. | 1/52-10/57 |
| General American de Mexico, S.A. | 4/61-10/66 | |
| General American de Mexico | 4/70-1/80; eliminated 4/87 | |
| Arrendadora Nacional de Carros de Ferrocarril, S.A. | added 4/87; eliminated 4/91 | |
| Arrendadora Nacional de Carros de Ferrocarril, S.A. de C.V. | added 4/91; 1/94-7/2000 | |
| GANO | The Georgia Northern Ry. Co. | 1/75-7/2000 |
| GAOX | General American Transportation Corp. | 4/61-1/80; eliminated 10/92 |
| GAPX | Georgia-Pacific Plywood Co. | added 4/54 |
| Georgia-Pacific Corp. | 10/57-4/61; added 4/67; 4/70-1/75; eliminated 1/79 | |
| Georgia-Pacific Corp., Plaquemine Division | added 1/79; 1/80; eliminated 4/85 | |
| The Georgia Gulf Corp., Plaquemine Division | added 4/85; 1/94-7/2000 | |
| GARX | General American Refrigerator Express Co. (General American Transportation Corp.) | 4/38-10/66 |
| General American Transportation Corp. | 4/70-1/94; eliminated 1/98 | |
| General American Marks Co. | added 1/98; 7/2000 | |
| GASX | General American Transportation Corp. | 1/52-4/61; added 4/70; 4/70-1/94; eliminated 1/98 |
| General American Marks Co. | added 1/98; 7/2000 | |
| GATX | General American Tank Line (General American Transportation Corp.) | 4/38-10/66 |
| General American Transportation Corp. | 4/70-1/80; added 7/84; 1/94; eliminated 1/98 | |
| General American Marks Co. | added 1/98; 7/2000 | |
| GAUX | General American Transportation Corp., Freight Car Division | added 11/73 |
| General American Transportation Corp. | 1/75-1/80; eliminated 10/92 | |
| GAWX | General Analine & Film Corp., General Aniline Works Division | Jan-52 |
| Union Tank Car Co. | 10/57; eliminated 1/58 | |
| GAYX | General American Transportation Corp. | 1/75-1/80; eliminated 10/92 |
| GBFX | Green Bay Food Co. | 1/52-7/65; eliminated 7/66 |
| GBRX | Greenbrier Leasing Corp. | added 1/74; 1/75-7/2000 |
| GBRY | Gettysburg Ry. | Jul-00 |
| GBSX | Great Bear Spring Co. | 4/38-1/52; eliminated 10/57 |
| GBW | Green Bay & Western R.R. Co. | 4/38-10/66 & 1/75-1/80; eliminated 1/94 |
| Fox Valley & Western, Ltd. | added 1/94; 1/94-7/2000 | |
| GC | Graham County R.R. Co. | added 1/74; 1/75-1/80; eliminated 4/81 |
| Graham County R.R., Inc. | added 7/82 | |
| Georgia Central Ry., a Division of Wilmington Terminal R.R., Inc. | added 1/91 | |
| Georgia Central Ry. | eliminated 10/92 | |
| Georgia Central Ry., L.P. | added 10/92; 1/94-7/2000 | |
| GCBX | Gray Chemical Co. | Apr-38 |
| GCCX | Gaylord Container Corp. | 1/52-10/57; eliminated 7/56 |
| Gaylord Container Corp., Division of Crown Zellerbach Corp. | added 7/56; eliminated 1/60 | |
| Gaylord Container Division, Crown Zellerbach Corp. | added 1/60 | |
| Crown Zellerbach Corp. | eliminated 10/60 | |
| General Cable Corp. | 7/65-1/75; eliminated 7/78 | |
| GATX Leasing Corp. | added 7/90; eliminated 10/90 | |
| GATX Capital Corp. | added 10/90; 1/94-7/2000 | |
| GCEX | Gulf Coast Grain Co. | Jan-80 |
| GCFX | Alsthon Canada Inc. -- Transport | Jul-00 |
| GCGX | Gulf Coast Grain, Inc. | added 7/79; 1/80; added 7/87 |
| GCIX | Gabriel Chemicals | added 1/97; eliminated 1/98; 7/2000 |
| GCLX | Glaser, Crandell Co. | 4/38-7/65; eliminated 7/65 |
| General Chemical Canada, Ltd. | added 1/88; eliminated 7/91 | |
| Gold Coast Ltd. | Jul-00 | |
| GCMX | Garfield Chemical & Manufacturing Co. (American Smelting & Refining Co.) | Apr-38 |
| Garfield Chemical & Manufacturing Corp. | added 4/57; 10/57 | |
| Gulf Coast Management Corp. | eliminated 1/88 | |
| GCOX | Miller Compressing Co. | 7/65-4/70; eliminated 1/73 |
| GCPX | Georgia Pacific Chemicals, Inc. | added 10/84; eliminated 4/85 |
| Georgia Gulf Corp., PVC Division | added 4/85; 1/94-7/2000 | |
| GCRC | The Golden Cat R.R. Corp. | added 7/88; eliminated 4/89; added 7/91; 1/94; eliminated 1/95 |
| GCRX | General American Transportation Corp. | added 4/68; 4/70-1/75; eliminated 7/75; 1/80 |
| GCRX | Grand Canyon Ry., Inc. | Jul-00 |
| GCSR | Gulf, Colorado & San Saba Ry. | 1/94-7/2000 |
| GCSX | Granite City Steel Co. | 4/38-4/61 |
| GCTX | General Chemical Corp. | added 7/87; 1/94-7/2000 |
| GCW | Garden City Western Ry. Co. | 4/38-1/80; eliminated 7/86; eliminated 7/89; 1/94-7/2000 |
| GCX | General Chemical Co. | Apr-38 |
| General Chemical Division Allied Chemical & Dye Corp. | 1/52-10/57; eliminated 7/58 | |
| General Chemical Division Allied Chemical Corp. | added 7/58; 4/61 | |
| First Union Properties, Inc. | Jul-65 | |
| General Chemical Division, Allied Chemical Corp. | 10/66; eliminated 1/67 | |
| Allied Chemical Corp. | added 1/67; 4/70; eliminated 10/72 | |
| Alltank Equipment Corp. | added 10/72; 1/75-1/94; eliminated 7/95; eliminated 1/99 | |
| AlliedSignal Inc. | added 1/99; eliminated 7/2000 | |
| Honeywell International, Inc. | added 7/2000; 7/2000 | |
| GCY | Green County R.R. | 4/38-1/52 |
| GDCX | General American Transportation Corp. | added 7/60; 4/61-1/94; eliminated 1/98 |
| General American Marks Co. | added 1/98; 7/2000 | |
| GDJX | Grimmel Industries | Jul-00 |
| GDPX | Gas del Pacifico | Jan-52 |
| GDX | Metal & Thermit Corp. | Apr-38 |
| GEAX | Trancisco Leasing Co. | added 10/94; eliminated 7/97 |
| Trinity Rail Management, Inc. | added 7/97; 7/2000 | |
| GECX | General Electric Co., Transportation Systems Business Operations | 1/94-7/2000 |
| GEGX | GE Gas Turbine | added 1/95; added 4/95; added 4/97; 7/2000 |
| GEIX | General American Transportation Corp. | Jan-94 |
| GELX | Garvey Elevators, Inc. | added 7/66; 10/66-1/94; eliminated 10/94 |
| Grain Marketing, L.C. | Jul-00 | |
| GEMX | General Electric Railcar Services Corp. | added 1/99; eliminated 1/2000 |
| General Electric Rail Services Corp. | added 1/2000; 7/2000 | |
| GENX | Gentner Packing Co., Inc. | added 7/69; 4/70; eliminated 4/74; 1/75-1/80 |
| General Electric Railcar Services Corp. | added 10/88; 1/94; eliminated 1/2000 | |
| General Electric Rail Services Corp. | added 1/2000; 7/2000 | |
| GEOX | GEO Specialty Chemicals | 1/94-7/2000 |
| GEPX | National Car Co. | added 7/55 |
| Fruit Growers Express Co. | 10/57-7/65 | |
| Gentner Packing Co., South Bend, Ind. (National Car Co.) | Oct-66 | |
| National Car Co. | eliminated 1/68 | |
| Transisco Leasing Co. | added 10/95; eliminated 7/96 | |
| Trinity Rail Management, Inc. | added 7/97; 7/2000 | |
| GERY | Georgia Eastern R.R. Co. | added 7/87; eliminated 10/88 |
| GETX | Getty Oil Co. | added 1/71 |
| Getty Oil Co. (Eastern Operations), Inc. | Jan-75 | |
| Getty Refining and Marketing Co. | Jan-80 | |
| Texaco Chemical Co. | 1/94; eliminated 4/94 | |
| Texaco Refining and Marketing, Inc. | added 4/94; eliminated 1/95 | |
| General American Transportation Corp. | added 1/95; eliminated 1/98 | |
| General American Marks Co. | added 1/98; 7/2000 | |
| GETY | Gettysburg R.R. Co. | 1/80; added 4/80; 1/94; eliminated 4/97 |
| GEX | General Electric Co. | 4/38-7/2000 |
| GEXR | Goderich-Exeter Ry. Co., Ltd. | 1/94; added 10/98; 7/2000 |
| G&F | Georgia & Florida Ry. | 4/38-10/66 |
| GF | Central of Georgia R.R. Co. | 1/75-1/80 |
| Southern Ry. System | eliminated 1/91 | |
| Norfolk Southern Ry. Co. | added 1/91; 1/94-7/2000 | |
| GF&A | Georgia, Florida & Alabama Ry. | 4/38-1/52 |
| GFAX | Gordon Fay Associates, Inc. | added 1/97; eliminated 4/97; 7/2000 |
| GFC | Grand Falls Central Ry. Co., Ltd. | 1/75-7/2000 |
| GFCX | Merchants Despatch Transportation Corp. | added 10/60; 4/61-1/80; eliminated 1/82 |
| GFDX | General Foods Corp. | added 10/74; eliminated 1/75 |
| GFHX | Commercial Credit Capital Corp. | added 7/73; 1/75-1/80; eliminated 7/89 |
| Gifford-Hill & Co., Inc. | eliminated 4/91 | |
| Beazer West, Inc. | added 4/91; 1/94; eliminated 10/94 | |
| GFJX | Garrett Railroad Car & Equipment, Inc. of Florida | added 10/82; eliminated 4/88 |
| GFR | Grand Forks Ry. Co. | 1/94-7/2000 |
| GFRR | Georgia & Florida R.R. Co., Inc. | eliminated 7/99 |
| Georgia & Florida Railnet Inc. | added 7/99; 7/2000 | |
| GFRX | Western Refrigerator Line Co. | added 1/60; 4/61-4/70 |
| Western Refrigerator Line Co. Terminal | 1/75-1/80 | |
| Western Refrigerator Line Co. | eliminated 10/81; eliminated 1/82 | |
| GFSX | GATX Leasing Corp. | added 10/89; eliminated 10/90 |
| GATX Capital Corp. | added 10/90; 1/94-7/2000 | |
| GGCX | Suburban Fuel Tank Car Co. | added 1/60; 4/61-1/75; eliminated 1/79 |
| Continental Tank Car Corp. | added 1/79; 1/80; eliminated 1/81 | |
| Georgia Gulf Corp.-Plaquemine Division | added 7/88; 1/94-7/2000 | |
| GGIX | Garvey Grain Inc. | added 11/73 |
| Garvey International Inc. | Jan-75 | |
| Garvey International Inc., Garvey Grain Division | 1/80-1/94; eliminated 7/95 | |
| Interail, Inc. | added 7/95; eliminated 7/96 | |
| Garvey International Inc. | added 7/96 | |
| Garvey International Inc., Garvey Grain Division | Jul-00 | |
| GGMX | Goodpasture Grain & Milling Co., Inc. | added 4/62; 7/65-10/66; eliminated 4/67 |
| Goodpasture, Inc. | added 4/67; 4/70-1/80; eliminated 7/80 | |
| Golden Gate Railroad Museum, Inc. | Jul-00 | |
| GGPX | General American Transportation Corp. | added 4/70; 4/70-1/94; eliminated 1/98 |
| General American Marks Co. | added 1/98; 7/2000 | |
| GGS | Georgia Great Southern Division, South Carolina Central/R.R. Co., Inc. | added 1/91; 1/94 |
| Georgia Great Southern Division | eliminated 4/94 | |
| Georgia Great Southern Division, South Carolina Central R.R. Co., Inc. | eliminated 7/94; 7/2000 | |
| GHBX | G. Helleman Brewing Co., Inc. | added 10/83; eliminated 10/89; 1/94-7/2000 |
| GH&H | Galveston, Houston & Henderson R.R. | 4/38-10/66 |
| GHH | Galveston, Houston and Henderson R.R. Co. | 1/75-1/80; eliminated 4/90 |
| GHMX | North American Car Corp. | added 7/68; 4/70-1/75; eliminated 4/76 |
| GHRD | Green Hills Rural Development, Inc. d/b/a Chillcothe-Brunswick Rail Maintenance Authority | added 1/87; eliminated 4/89; 1/94-7/2000 |
| GHRX | Good Hope Refineries, Inc. | added 1/80; 1/80; eliminated 7/82 |
| GHR Energy Corp. | added 7/82; eliminated 4/88 | |
| TransAmerican Natural Gas Corp. | added 4/88; eliminated 1/89 | |
| TransAmerican Refining Corp. | added 1/89; eliminated 7/90 | |
| GHSA | Galveston, Harrisburg & San Antonio Ry. | 4/38-1/52 |
| GHX | Gifford-Hill & Co. Inc. | Jan-52 |
| GICX | Gateway Investment Co. | added 7/66; 10/66; eliminated 7/67 |
| GIEX | GATX Capital Corp. | added 1/98; 7/2000 |
| GIHX | GFH Financial Services Corp. | added 1/74; 1/75 |
| Gifford-Hill & Co., Inc. | added 7/78; 1/80 | |
| Beazer West, Inc. | 1/94; eliminated 10/97 | |
| Cornerstone C&M Inc. d/b/a Gifford-Hill & Co. | added 10/97; 7/2000 | |
| GILX | Gilmore Oil Co. | Apr-38 |
| Gilman Paper Co. | added 10/92; 1/94-7/2000 | |
| GIMX | GATX Capital Corp. | added 1/98; 7/2000 |
| GIRX | Georgia Industrial Realty Co. | 7/65; eliminated 4/66; added 7/74; eliminated 10/74 |
| GITM | Golden Isles Terminal R.R., Inc. | added 10/98; 7/2000 |
| GJ | Greenwich & Johnsonville Ry. | 4/38 & 1/75-1/80; eliminated 10/82 |
| GKLX | Gold Kist Inc. | added 7/81; 1/94-7/2000 |
| GLCX | Great Lakes Chemical Corp. | added 10/58; 4/61-7/65; eliminated 1/66 |
| Great Lakes Carbon Corp. | added 4/73; 1/75-7/2000 | |
| GLDX | Glades Gas Co. | 7/65; eliminated 4/66 |
| GLKX | Great Lakes Chemical Corp. | added 4/82; 1/94-7/2000 |
| GLNX | Glenco Transportation Services, Inc. | 1/80; eliminated 1/81 |
| GLNX Corp. | added 1/81; 1/94-7/2000 | |
| GLPX | Great Lakes Propane Co. | added 7/66; 10/66; eliminated 1/69 |
| Falley Petroleum Co. | added 1/69; eliminated 4/69 | |
| Falley Corp. | added 4/69; eliminated 7/69; 4/70 | |
| GLRX | Georgetown Loop R.R., Inc. | Jul-00 |
| GLSR | Gloster Southern R.R. Co. | added 10/86; 1/94-7/2000 |
| GLSX | Great Lakes Steel Corp. | 1/52-4/61 |
| Great Lakes Steel Corp., Division of National Steel Corp. | added 1/66; eliminated 10/66 | |
| Great Lakes Steel Division, National Steel Corp. | added 10/66; 10/66-4/70; eliminated 10/71 | |
| Glacier State Distribution Services, Inc. | added 1/96; eliminated 4/2000; 7/2000 | |
| GM | Gainesville Midland R.R. Co. | 1/75-1/80; eliminated 1/83 |
| GMCX | General Motors Corp. | 1/80; eliminated 7/87 |
| GMGX | M & G Inc. | added 1/2001; eliminated 4/2001 |
| M & G Polymers U.S.A. LLC | added 4/2001 | |
| GMHX | General Leasing Corp. | added 4/2000; 7/2000 |
| GMIX | General Mills, Inc. | added 4/79; 1/80; eliminated 10/83 |
| Chicago Freight Car Leasing Co. | added 10/88; 1/94-7/2000 | |
| GM&N | Gulf, Mobile & Northern R.R. | 4/38-1/52 |
| GM&O | Gulf, Mobile & Ohio R.R. | 1/52-10/66 |
| GMO | Illinois Central Gulf R.R. Co. (Gulf, Mobile & Ohio R.R. Co.) | 1/75-1/80 |
| Illinois Central Gulf R.R. Co. | eliminated 4/88 | |
| Illinois Central R.R. Co. | added 4/88; 1/94-7/2000 | |
| GMRC | Green Mountain R.R. Corp. | 1/75-7/2000 |
| GMRY | Great Miami & Scioto Ry. Co. | added 10/98; 7/2000; eliminated 1/2001 |
| GMSR | Gulf & Mississippi R.R. Corp. | added 1/86; eliminated 7/88 |
| SouthRail Corp. | added 7/88; 1/94; eliminated 7/94 | |
| Kansas City Southern Ry. Co. | added 7/94; 7/2000 | |
| GN | Great Northern Ry., Co. | 4/38-10/66 |
| Burlington Northern Inc. | 1/75-1/80; eliminated 7/81 | |
| Burlington Northern R.R. Co. | added 7/81; 1/94 | |
| Burlington Northern Santa Fe Ry. Co. | Jul-00 | |
| GNA | Graysonia, Nashville & Ashdown R.R. Co. | 1/75-1/80; added 4/80; eliminated 10/93 |
| Kansas City Southern Ry. Co. | added 10/93; 1/94-7/2000 | |
| GNAX | Gloucester N.A., Inc. | added 1/85; eliminated 10/87 |
| Holnam, Inc. | added 7/91; 1/94-7/2000 | |
| GNBC | Grainbelt Corp. | added 4/88; 1/94-7/2000 |
| GNFX | City of Gainesville, Florida | added 4/81; 1/94-7/2000 |
| GNGX | Boothe Leasing Corp. | added 1/62; 7/65; eliminated 7/66 |
| GNLX | Georgia Industrial Leasing Co., Inc. | added 1/97; 7/2000; eliminated 7/2001 |
| GNPX | Great Northern Plywood Co. | added 11/73; 1/75; eliminated 7/75 |
| GNPX | Great Southern Plywood Co. | added 7/75; eliminated 7/79 |
| GNRR | Georgia Northeastern R.R. Co., Inc. | added 7/88; 1/94-7/2000 |
| GNW | Genessee & Wyoming R.R. | 4/61-10/66 & 1/75; eliminated 7/75 |
| GNWR | Genessee and Wyoming R.R. Co. | 7/65-7/2000 |
| GOCX | Gulf Oil Co.--U.S. Division of Gulf Oil Corp. | 1/80; eliminated 7/82 |
| Gulf Refining and Marketing Co., Division of Gulf Oil Corp. | added 7/82 | |
| Chevron U.S.A. Inc. | 1/94; eliminated 4/96 | |
| Chevron Chemical Co. | added 4/96; 7/2000; eliminated 1/2001 | |
| Chevron Phillips Chemical Co. L.P. | added 1/2001 | |
| GOHX | General American Transportation Corp. | 1/75-1/94; eliminated 1/98 |
| General American Marks Co. | added 1/98; 7/2000 | |
| GOMX | Globe Grain & Milling Co. | Apr-38 |
| GONX | Railgon Co. | 1/80; added 7/80; 1/94-7/2000 |
| GOPX | Gas-Oil Products, Inc. | 1/52-4/61; eliminated 4/62 |
| Southeastern Natural Gas Corp. | added 4/62 | |
| GOT | Toronto Area Transit Operating Authority | Jan-80 |
| Toronto Area Transit Operating Authority (captive service) | 1/94-7/2000 | |
| GPBX | Piggy-Bank Inc., subsidiary of General American Transportation Corp. | added 10/58 |
| Piggy-Back Inc. | eliminated 1/60 | |
| General American Transportation Corp. | added 1/60; 4/61-4/70; eliminated 7/73 | |
| Georgia-Pacific Corp., Bellingham Division | added 7/77; 1/80-1/94; eliminated 4/95 | |
| Georgia-Pacific West, Inc. | added 4/95 | |
| Georgia-Pacific Corp. | Jul-00 | |
| GPCX | General Petroleum Corp. of California | Apr-38 |
| General Petroleum Corp. | 1/52-10/57; eliminated 1/60 | |
| Mobil Oil Co., a Division of Soncony Mobil Oil Co., Inc. | added 1/60 | |
| Socony Mobil Oil Co., Inc. | Apr-61 | |
| General Electric Co. | added 7/65; 7/65-1/80 | |
| General Electric Co., General Purpose Control Dept. | added 1/82; eliminated 4/87 | |
| Georgia-Pacific Corp., Container Division | added 7/90; 1/94 | |
| Georgia-Pacific Corp. | Jul-00 | |
| GPDX | General American Marks Co. | added 10/98; 7/2000 |
| GPEX | General American-Pfaudler Corp. | 4/38-10/66; eliminated 4/70 |
| General American Transportation Corp. | added 4/70; 4/70-1/94 | |
| GPFX | General American Transportation Corp. | added 10/92; 1/94; eliminated 1/98 |
| GPFX | General American Marks Co. | added 1/98; 7/2000 |
| GPIX | General Portland, Inc. | added 10/74; 1/75; eliminated 1/78; added 7/78; eliminated 4/79; added 10/80; 1/94; eliminated 4/95 |
| Sunbelt Cement, Inc. | added 4/95; 7/2000 | |
| GPLX | Getz Poultry and Egg Corp. | Apr-38 |
| General American Transportation Corp. | added 10/92; 1/94; eliminated 1/98 | |
| General American Marks Co. | added 1/98; 7/2000 | |
| GPMX | Glacier Production Co. | Apr-38 |
| Gas Properties Management Co. | 7/65-4/70; eliminated 4/73 | |
| Georgia-Pacific Corp., Mid-Continent Wood Products Manufacturing Division | added 10/86; added 7/87; added 10/89; 1/94-7/2000 | |
| GPPX | Georgia-Pacific Corp., Portland Division | added 4/78; 1/80; eliminated 10/92 |
| Georgia-Pacific Corp., Chemical Division | added 10/92; 1/94 | |
| Georgia-Pacific Corp. | Jul-00 | |
| GPRX | Quartermaster Corps, War Department, U.S.A. | Apr-38 |
| GPSX | Georgia-Pacific Corp., Southern Division | 1/75-1/80 |
| Georgia-Pacific Corp., Eastern Wood Products Manufacturing Division | Jan-94 | |
| Georgia-Pacific Corp. | Jul-00 | |
| GPUX | GPU Service Corp. | added 7/81; 1/94-7/2000 |
| GPX | Georgia Pine Turpentine Co. | Apr-38 |
| The Glidden Co., Naval Stores Division | 1/52-4/61 | |
| GR | Grasse River R.R. | 4/38-7/65 |
| Grand Rapids Eastern R.R., Inc. | 1/94; added 10/94; 7/2000 | |
| GRAX | Grax Corp. | added 7/65; 7/65-10/66; eliminated 7/68 |
| GRCX | Gulf Oil Corp. | 4/38-10/57 |
| Warren Petroleum Corp. | Apr-61 | |
| Granite Rock Co. | added 1/71; 1/75-7/2000 | |
| GRDX | Grand River Dam Authority | added 10/78; eliminated 4/79; added 1/81; 1/94-7/2000; eliminated 7/2001 |
| GREX | Georgetown Rail Equipment Co. | 1/94; added 7/98; 7/2000 |
| GRFF | Georgia & Florida R.R. Co., Inc. | Jul-00 |
| GRHX | Gulf Railcar, Inc. | added 1/91; eliminated 7/92; 1/94 |
| GRIN | Great Plains Ry. Co. | added 10/74; 1/75; eliminated 4/76 |
| GRIV | Gauley River R.R., L.L.C. | Jul-00 |
| GRIX | Gulf Railcar, Inc. | added 1/91; eliminated 4/91 |
| GRMX | The Gopher State Railway Museum Inc. | Jul-00 |
| GRN | Greenville & Northern Ry. Co., Inc. | 1/75; added 4/75; 1/80-1/94; eliminated 7/97 |
| Pinsly R.R. Co. | eliminated 4/97 | |
| Carolina Piedmont Division, South Carolina Central R.R. Co., Inc. | added 7/97; 7/2000; eliminated 10/2000 | |
| GRNR | The Grand River Ry. Co. | 1/75-7/2000 |
| GROX | Georgia Rosin Products Co. | Apr-38 |
| Growth Nonstock Cooperative, Inc. | added 7/80; eliminated 10/88 | |
| Chrysler Rail Transportation Corp. | eliminated 1/93 | |
| U.S. Rail Services, Inc. | added 1/93; 1/94; eliminated 4/94 | |
| USL Capital Rail Services | added 4/94; eliminated 10/96 | |
| First Union Rail | added 10/96; 7/2000 | |
| GRPX | General Chemical (Soda Ash) Partners | added 7/87; 1/94; eliminated 10/99 |
| The CIT Group/Capital Finance, Inc. | added 10/99; 7/2000 | |
| GRR | Georgetown R.R. Co. | 1/75-7/2000 |
| GRRX | Wampum Hardware | 1/94-7/2000 |
| GRSX | National Car Co. | Jan-52 |
| Gunderson Rail Services | added 7/2000; 7/2000 | |
| GRTX | Wheelabrator Coal Services Co. | added 4/94; 7/2000; eliminated 4/2001 |
| Savage-Tolk Energy Services | added 4/2001 | |
| GRWR | Great Walton R.R. Co. | 1/94-7/2000 |
| GRYX | John H. Grace Co. | 4/38-7/2000 |
| GSAX | Granite State Concrete Co. | Jul-00 |
| GSCX | Gulf States Creosoting Co. | 4/38-1/52 |
| Greenlease Co., a Division of Greenville Steel Car Co. | added 7/63 | |
| Greenville Steel Car | Jul-65 | |
| Greenlease Co., a Division of Greenville Steel Car Co. | Oct-66 | |
| Greenville Steel Car Co. | 4/70-1/75 | |
| Greenlease Co., a Division of Greenville Steel Car Co. | 1/80; eliminated 4/81 | |
| Greenville Leasing Co. | added 4/81; eliminated 4/85 | |
| GATX/GLC Leasing Corp. | added 4/85; 1/94-7/2000 | |
| GSDX | General Standard Co. | Apr-70 |
| GSF | Georgia Southern and Florida Ry. Co. | 1/75-7/2000 |
| GS&G | Georgia, Southwestern & Gulf R.R. | Apr-38 |
| G&SI | Gulf & Ship Island R.R. | Apr-38 |
| GSIX | Gas Service, Inc. | added 7/69; 4/70; eliminated 1/75 |
| Gas Supply, Inc. | added 7/77; 1/80-1/94; eliminated 10/99 | |
| Williams Energy Ventures, Inc. | added 10/99; 7/2000 | |
| GSM | Great Smokey Mountains Ry. | 1/94-7/2000 |
| GSNX | Gulf States Utilities Co. | added 10/81; 1/94; eliminated 7/98 |
| HELM Financial Corp. | added 7/98; 7/2000 | |
| GSOR | Indiana Hi-Rail Corp. | added 4/86; 1/94; eliminated 1/95 |
| Wabash & Ohio R.R. | added 1/95 | |
| Indiana Hi-Rail Corp. | added 7/95; eliminated 7/98; 7/2000 | |
| GSOX | Valvoline Oil Co. | Apr-38 |
| GSPX | Gaspesia Sulphite Co., Ltd. | Jan-52 |
| Great Southern Plywood Co. | added 7/75; 1/80; eliminated 10/88 | |
| GSRX | Golden Spike Railroad Services | Jul-00 |
| GSSX | Republic Steel Corp. (Gulf Steel Division) | Apr-38 |
| Goar's Service & Supply | 1/52-10/57; eliminated 4/61 | |
| GSW | Great Southwest R.R., Inc. | 1/75-1/80; eliminated 4/88 |
| GSWR | Georgia Southwestern Division, South Carolina Central R.R. Co., Inc. | added 10/89; 1/94-7/2000 |
| GSWX | Glen Summit Springs Water Co., Inc. | Apr-38 |
| G&S Co., Inc. | added 1/80; 1/80; eliminated 4/88 | |
| GSX | Gotham Live Stock Express (Mather Stock Car Co.) | Apr-38 |
| Mather Stock Car Co. | Jan-52 | |
| GT | Grand Trunk Ry. | 4/38-1/52 |
| GTA | Grand Trunk Western R.R. Co. | 1/75-1/80; eliminated 1/83 |
| Grand Trunk Western R.R. Inc. | 1/94-7/2000 | |
| GTAX | Grain Terminal Association | added 7/79; 1/80 |
| Harvest States Cooperatives | 1/94-7/2000; eliminated 10/2000 | |
| GTC | Gulf Transport | 1/75-1/80 |
| GTIS | Guilford Transportation Industries (for tariff identification only) | 1/94-7/2000 |
| GTLX | Grubbs Tank Line | Apr-38 |
| GTP | Grand Trunk Pacific Ry. | 4/38-1/52 |
| GTR | Great River R.R. Rosedale-Bolivar County Port Commission | 1/94-7/2000 |
| GTRA | Golden Triangle R.R. | added 7/82; 1/94-7/2000 |
| GTTX | Trailer Train Co. | Jul-65 |
| Trailer Train Co. (FC flat cars equipped with hitches and bridge plates for the transportation of trailers and manufactured by GATC) | 10/66-10/68 | |
| Trailer Train Co. | Apr-70 | |
| Trailer Train Co. (Flat cars, equipped with hitches and bridge plates for the transportation of trailers. Cars built by GATC) | 1/75-1/80 | |
| Trailer Train Co. | eliminated 1/92 | |
| TTX Co. | added 1/92 | |
| TTX Co. (89' flat cars that have been modified for autorack services that have not been racked) | Jan-94 | |
| TTX Co. (89 ft. flat cars that have been modified for autorack service that have not been racked, equipped with end of car cush.) | Jul-00 | |
| GTW | Grand Trunk Western R.R. Co. | 4/38-10/66 & 1/75-1/80 |
| Grand Trunk Western R.R. Inc. | 1/94-7/2000 | |
| GTWQ | Grand Trunk Western R.R. Inc. | added 7/95; 7/2000 |
| G&U | Grafton & Upton R.R. | 4/38-10/66 |
| GU | (G&U) Grafton & Upton R.R. Co. | 4/70-7/2000 |
| GUAX | Georgia Power Co. | added 10/82; 1/94; eliminated 10/99; 7/2000; added 10/2000 |
| GUEX | General American Transportation Corp. | added 4/71; 1/75-1/94; eliminated 1/98 |
| General American Marks Co. | added 1/98; 7/2000 | |
| GVCX | Glen-Valley Corp. | added 1/81; eliminated 1/87 |
| GVDX | The GEON Co. | added 4/96 |
| Oxy Vinyls L.P. | added 7/99; 7/2000 | |
| GVLX | Greenlease, Inc. | added 10/84; eliminated 1/90 |
| Greenville Leasing Co. | eliminated 1/85 | |
| GVSR | Galveston Ry., Inc. | added 1/88; eliminated 1/92 |
| Galveston R.R., L.P. | added 1/92; 1/94-7/2000 | |
| GWAX | Railroad Salvage & Restoration, Inc. | Jul-00 |
| GWBX | Carling Brewing Co. | eliminated 4/55 |
| GWCX | Great Western Chemical Co. | added 4/62; 7/65-4/70 |
| GWEX | Great Western Electro-Chemical Co. | Apr-38 |
| Western Division, The Dow Chemical Co. | 1/52-7/65; eliminated 1/66 | |
| GWF | Galveston Wharf Co. | 4/38-1/52 |
| Galveston Wharves | 10/57-10/66 & 1/75-1/80; eliminated 4/86; eliminated 7/88 | |
| GWHX | Stephens Energy Ltd. | added 10/81; eliminated 4/90 |
| GWIN | Goodwin R.R., Inc. | Jan-80 |
| GWIX | GWI Leasing Corp. | added 1/79; 1/80-7/2000 |
| GWR | Great Western Ry. Co. | 4/38-7/2000 |
| GWRC | Georgia Woodlands R.R. Co. | 1/94-7/2000 |
| GWSW | GWI Switching Services, L.P. | Jul-00 |
| GWWE | Gateway Eastern Ry. Co. | added 4/94; 7/2000 |
| GWWR | Gateway Western Ry. | added 4/90; 1/94-7/2000 |