| 1 | GWS | Great Western Airlines, Inc. | Callsign: Great Western, | USA | AVCODES |
| 2 | GWS | General Airways | | | ICAO1 |
| 3 | GWS | Golden West Service | | USA | TRAFFIC |
| 4 | GWSA | GWS TRANSPORT | | | SCAC4 |
| 5 | GWSC | GLOBAL WINDOW SOLUTIONS INC | | | SCAC4 |
| 6 | GWSF | GWS TUBE FORMING SOLUTIONS INC | | | SCAC4 |
| 7 | GWSG | GREEN WORLDWIDE SHIPPING LLC | | | SCAC4 |
| 8 | GWSI | GATES-WINDSOR OPERATIONS (DIVISION | | | SCAC4 |
| 9 | GWSL | GWS TRANSPORTATION LTD | | | SCAC4 |
| 10 | GWSN | GREAT WESTERN SHIPPING | | | SCAC1 |
| 11 | GWSN | GREAT WESTERN STEAMSHIP COMPANY | | | SCAC4 |
| 12 | GWSP | GALWAY SHIPPING CO LTD PIRAEUS GREE | | | SCAC4 |
| 13 | GWSR | Great Western Ry. Ltd. | 7/2005 | | NAKINA |
| 14 | GWSR | GREAT WEESTERN RAILWAY LTD (GREAT WESTERN RAILWAY OF COLORADO) | | | PWRC |
| 15 | GWSR | Great Western Railway (Saskatchewan) | | | RSRV |
| 16 | GWSW | GWI Switching Services, L.P. | 7/2000-7/2005 | | NAKINA |
| 17 | GWSW | GWI Switching Services, L.P. | Jul-00 | | NRHS |
| 18 | GWSW | GWI SWITCHING SERVICES LP [GENESSEE & WYOMING SWITCHING] | | | PWRC |
| 19 | GWSW | GWI Switching Services | | | RSRV |
| 20 | GWSW | GWI SWITCHING SERVICES L P | | | SCAC4 |
| 21 | GWSY | GROWSAFE SYSTEMS LTD | | | SCAC4 |
| 22 | GWSZ | GREAT WESTERN SUGAR CO. | | | PWRC |
