| Abbreviation | Definition |
|---|---|
| GNA | Graysonia, Nashville and Ashdown Railroad (Kansas City Southern Railway) |
| GNA | Kansas City Southern Railway Company |
| GNAX | Holnam |
| GNAX | Holnam Incorporated |
| GNBC | Grainbelt Corporation |
| GNBC | Grainbelt Corporation (Farmrail) |
| GNCU | Gallatin National |
| GNCU | Gallatin National Company |
| GNDJ | Grand Junction, Colorado, railroad ticketing code |
| GNER | Greater North Eastern Railway |
| GNFU | Global Nuclear Fuels |
| GNFX | City of Gainesville Florida |
| GNFX | City of Gainesville, Florida |
| GNLX | Georgia Industrial Leasing |
| GNLX | Georgia Industrial Leasing Company |
| GNRR | Georgia Northeastern Railroad |
| GNRR | Georgia Northeastern Railroad Company |
| GNRS | Great Northern Rail Services |
| GNWR | Genesee and Wyoming Railroad |
| GNWR | Genesee and Wyoming Railroad Company |