| 1 | GWA | Great Western Air, Inc. | Callsign: G-W Air, | USA | AVCODES |
| 2 | GWA | Golden West Airlines | Callsign: Golden West, | USA | AVCODES |
| 3 | GWA | Great Western Air | | | ICAO1 |
| 4 | GWA | Genesee & Wyoming Australia | | AUS | TRAFFIC |
| 5 | GWAA | GREWAL, A H TRANSPORT | | | SCAC4 |
| 6 | GWAQ | GREAT WALL TRANSPORTATION LTD | | | SCAC4 |
| 7 | GWAR | GREAT WESTERN AUCTIONEERS INC | | | SCAC4 |
| 8 | GWAT | GAWIUK CONSTRUCTION LTD | | | SCAC4 |
| 9 | GWAX | Railroad Salvage & Restoration, Inc. | 7/2000-7/2005 (not listed) | | NAKINA |
| 10 | GWAX | Railroad Salvage & Restoration, Inc. | Jul-00 | | NRHS |
| 11 | GWAX | RAILROAD SALVAGE & RESTORATION, INC. | | | PWRC |
| 12 | GWAX | Railroad Salvage and Restoration | | | RSRV |
| 13 | GWAX | RAILROAD SALVAGE & RESTORATION INC | | | SCAC4 |
| 14 | GWAY | GOODWAY CARGO LINE | | | SCAC4 |
