| 1 | GCE | Air Europa Canarias Lineas Aereas S.A.U. | Callsign: Europa Canarias, Ceased operations | E | AVCODES |
| 2 | GCE | Guardia Civil | | E | TRAFFIC |
| 3 | GCEA | GOLF CAR EXPRESS | | | SCAC4 |
| 4 | GCED | GLOBAL CARGO EXPRESS INC | | | SCAC4 |
| 5 | GCEG | GRACE ENERGY CORPORATION | | | SCAC4 |
| 6 | GCEK | GREGORY, C E TRUCKING | | | SCAC4 |
| 7 | GCEN | Grand Central Railway | | GB | TRAFFIC |
| 8 | GCEP | GC3 LOGISTICS LLC | | | SCAC4 |
| 9 | GCEQ | GHISLAIN CHARTRAND EXCAVATION INC | | | SCAC4 |
| 10 | GCEU | SEACO SRL | | BDS | BIC |
| 11 | GCEU | GENSTAR CONTAINER CORPORATION | | | PWRC |
| 12 | GCEU | Genstar Container Corporation | | | RSRV |
| 13 | GCEU | GENSTAR CONTAINER CORPORATION | | | SCAC4 |
| 14 | GCEX | Gulf Coast Grain Co. | 1/1980 | | NAKINA |
| 15 | GCEX | Gulf Coast Grain Co. | Jan-80 | | NRHS |
| 16 | GCEX | GULF COAST GRAIN CO. | | | PWRC |
| 17 | GCEZ | GENSTAR CONTAINER CORPORATION | | | PWRC |
| 18 | GCEZ | Genstar Container Corporation | | | RSRV |
