| 1 | GGO | Avial | Callsign: Avial-Georgia, | GE | AVCODES |
| 2 | GGO | Go! Aviation Ltd. | Callsign: Go Bird, | FIN | AVCODES |
| 3 | GGOO | Grey Goose | | CDN | TRAFFIC |
| 4 | GGOS | GROUNDS GUYS OF SOUTHWEST FLORIDA, | | | SCAC4 |
| 5 | GGOT | GETGO TRANSPORTATION CO LLC | | | SCAC4 |
| 6 | GGOU | G2 OCEAN AS | | N | BIC |
| 7 | GGOX | Grayburg Oil Co. | 8/1920-7/1935; 7/1937 (not listed) | | NAKINA |
| 8 | GGOX | GRAYBURG OIL CO. | | | PWRC |