| 1 | G&ER | GLENDALE & EAST RIVER RR | | | PWRC |
| 2 | G&F | Georgia & Florida Ry. | 4/1938-10/1966 | | NAKINA |
| 3 | G&F | Georgia & Florida R.R. | 7/1930-7/1936 | | NAKINA |
| 4 | G&F | Georgia & Florida Ry. | 8/1920-7/1923 | | NAKINA |
| 5 | G&F | Georgia & Florida Ry. | 4/38-10/66 | | NRHS |
| 6 | G&F | GEORGIA & FLORIDA RAILWAY | | | PWRC |
| 7 | G&J | Greenwich & Johnsonville Ry. | 7/1923-7/1936 | | NAKINA |
| 8 | G&J | GREENWICH & JOHNSONVILLE RWY. | | | PWRC |
| 9 | G&SI | Gulf & Ship Island R.R. | 4/1938 | | NAKINA |
| 10 | G&SI | Gulf & Ship Island R.R. Co. (Illinois Central System) | 7/1935-7/1936 | | NAKINA |
| 11 | G&SI | Gulf & Ship Island R.R. Co. (Illinois Central R.R. Co.) | 7/1932 | | NAKINA |
| 12 | G&SI | Gulf & Ship Island R.R. Co. (Illinois Central System) | 7/1930 | | NAKINA |
| 13 | G&SI | Gulf & Ship Island R.R. Co. | 8/1920-07/1923 | | NAKINA |
| 14 | G&SI | Gulf & Ship Island R.R. | Apr-38 | | NRHS |
| 15 | G&SI | ILLINOIS CENTRAL SYSTEM [GULF & SHIP ISLAND RAILROAD CO.] | | | PWRC |
| 16 | G&U | Grafton & Upton R.R. (Co.) | 8/1920-10/1966 | | NAKINA |
| 17 | G&U | Grafton & Upton R.R. | 4/38-10/66 | | NRHS |
| 18 | G&U | GRAFTON & UPTON RAILROAD CO. | | | PWRC |
| 19 | G&W | Glenmora & Western Ry. Co. | 7/1923 | | NAKINA |
| 20 | G&W | *GLENFIELD & WESTERN RAILROAD | | | PWRC |
| 21 | G&W | *GLENMORA & WESTERN RAILWAY CO. | | | PWRC |
