| 1 | GAM | German Army | Callsign: German Army, | D | AVCODES |
| 2 | GAM | Guy America Airways | IATA: GK, Callsign: Guyam, | USA | AVCODES |
| 3 | GAM | German Army | | | ICAO1 |
| 4 | GAMD | GAMACHE, DAN TRUCKING INC | | | SCAC4 |
| 5 | GAME | GULF AMERICAN LINE | | | SCAC4 |
| 6 | GAMJ | GRAEBEL ALBUQUERQUE MOVERS INC | | | SCAC4 |
| 7 | GAMM | GARCIA MURILLO, MARIO ALBERTO | | | SCAC4 |
| 8 | GAMN | GAM TRUCKING | | | SCAC4 |
| 9 | GAMO | GRAEBEL AMERICAN MOVERS INC | | | SCAC4 |
| 10 | GAMQ | GRAEBEL ATLANTA MOVERS INC | | | SCAC4 |
| 11 | GAMR | GAMRADT, LYLE INC | | | SCAC4 |
| 12 | GAMS | GRAND AMERICAN ROAD RACING | | | SCAC4 |
| 13 | GAMU | STOLPI GAMAR EHF | | IS | BIC |
| 14 | GAMU | JONAR SF | | | SCAC4 |
| 15 | GAMX | Arrendadora Nacional de Carros de Ferrocarril, S.A. de C.V. | added 4/1991; 1/1994-7/2005 | | NAKINA |
| 16 | GAMX | Arrendadora Nacional de Carros de Ferrocarril, S.A. | added 4/1987; eliminated 4/1991 | | NAKINA |
| 17 | GAMX | General American de Mexico | 4/1970-1/1980; eliminated 4/1987 | | NAKINA |
| 18 | GAMX | General American de Mexico, S.A. | 4/1961-10/1966 | | NAKINA |
| 19 | GAMX | General American de Mexico, S.A. | added 10/1954; 10/1957 | | NAKINA |
| 20 | GAMX | General American Transportation de Mexico, S.A. | 1/1950-7/1954; eliminated 10/1954 | | NAKINA |
| 21 | GAMX | General American Transportation de Mexico, S.A. | 1/52-10/57 | | NRHS |
| 22 | GAMX | General American de Mexico, S.A. | 4/61-10/66 | | NRHS |
| 23 | GAMX | General American de Mexico | 4/70-1/80; eliminated 4/87 | | NRHS |
| 24 | GAMX | Arrendadora Nacional de Carros de Ferrocarril, S.A. | added 4/87; eliminated 4/91 | | NRHS |
| 25 | GAMX | Arrendadora Nacional de Carros de Ferrocarril, S.A. de C.V. | added 4/91; 1/94-7/2000 | | NRHS |
| 26 | GAMX | GENERAL AMERICAN DE MEXICO (ARRENDADORA NACIONAL DE CARROS DE FERROCARRIL, SA) | | | PWRC |
| 27 | GAMX | General American de Mexico (Arrendadora Nacional De Carros De Ferrocaril) | | | RSRV |
| 28 | GAMX | ARRENDADORA NACIONAL DE CARROS DE F | | | SCAC4 |
| 29 | GAMZ | GARDINIER MINE | | | PWRC |