| 1 | GMA | Gama Aviation Ltd. | Callsign: Gama, ICAO designator changed from GOG | GB | AVCODES |
| 2 | GMA | Gama Aviation | | | ICAO1 |
| 3 | GMA | GEORGIA MARBLE | | | PWRC |
| 4 | GMAC | GMA COVER CORPORATION | | | SCAC4 |
| 5 | GMAD | GMA ACCESSORIES INC | | | SCAC4 |
| 6 | GMAE | GRUBB, MICHAEL T | | | SCAC4 |
| 7 | GMAM | GRAEBEL MID-ATLANTIC MOVERS - CHANT | | | SCAC4 |
| 8 | GMAN | GARMAN TRUCKING COMPANY, INC | | | SCAC1 |
| 9 | GMAT | GLOBAL LAND MATERIALS INC | | | SCAC4 |
| 10 | GMAW | GILLIANO MOTOR TRANSPORT INC | | | SCAC4 |
| 11 | GMAY | GARCIA, MANUEL | | | SCAC4 |
| 12 | GMAZ | GENERAL MOTORS AUTO TERMINAL | | | PWRC |
