| 1 | GCN | Gulf Central Airlines, Inc. | Callsign: gulf Central, | USA | AVCODES |
| 2 | GCN | Gulf Central Airlines | | | ICAO1 |
| 3 | GCN | *RETIRED 01-21-92 ATP (333) | | | PWRC |
| 4 | GCN | *GARDEN CITY NORTHERN RWY. | | | PWRC |
| 5 | GCNF | GLOBE CON FREIGHT SYSTEMS INC | | | SCAC4 |
| 6 | GCNG | Greek Cypriot National Guard | | CY | TRAFFIC |
| 7 | GCNN | GREAT CANADIAN NICKELODEON CO LTD, | | | SCAC4 |
| 8 | GCNS | GIROUX, CHRISTIAN | | | SCAC4 |
| 9 | GCNU | GRIMALDI GROUP SPA | | I | BIC |
| 10 | GCNU | GRIMALDI COMPAGNIA DI NAVIGAZIONE | | | SCAC4 |
| 11 | GCNX | General Construction Corp. | 4/1947-1/1950 | | NAKINA |
| 12 | GCNX | GENERAL CONSTRUCTION CORP. | | | PWRC |
