| 1 | GCSX | Gulf, Colorado & San Sabe Ry. | 7/2005 | | NAKINA |
| 2 | GCSX | Granite City Steel Co. | 7/1930-1/1941; 1/1943-4/1961 (not listed) | | NAKINA |
| 3 | GCSX | Granite City Steel Co. | 4/38-4/61 | | NRHS |
| 4 | GCSX | *GRANITE CITY STEEL CO. | | | PWRC |
| 5 | GCSX | *GULF, COLORADO & SAN SABA RWY. | | | PWRC |
| 6 | GCSX | RAIL LOGISTICS SERVICES INC | | | SCAC4 |
