| 1 | GM | Air Slovakia BWJ, Ltd. | ICAO: SVK, Callsign: Slovakia, Founded in 1993. Commenced operations in 1994. AOC Revoked by Slovak authorities. | SK | AVCODES |
| 2 | GM | Transwede Airways AB | ICAO: GMP, Callsign: Transwede, Renamed Blue Scandinavia on 28 October 1996. | S | AVCODES |
| 3 | GM | Tri-MG Intra Asia Airlines, PT. | ICAO: TMG, Callsign: Trilines, IATA Prefix: 864, | RI | AVCODES |
| 4 | GM | Germania Flug AG t/a Holiday Jet | ICAO: GSW, Callsign: Eiger, Founded in August 2014. Name changed to Germania Flug AG in November 2019. | CH | AVCODES |
| 5 | GM | Chair Airlines AG t/a chair | ICAO: GSW, Callsign: Eiger, Founded in August 2014. Name changed from Germania Flug AG t/a Holiday Jet in November 2015 then changed from Germania Flug AG w.e.f. 11 June 2019. | CH | AVCODES |
| 6 | GM | Germania Flug AG | ICAO: GSW, Callsign: Eiger, Founded in August 2014. Name changed from Germania Flug AG t/a Holiday Jet in November 2015. Name changed to Chair Airlines AG t/a chair w.e.f. 01 July 2019. | CH | AVCODES |
| 7 | GM | Gainesville Midland R.R. Co. | 1/1975-1/1980; eliminated 1/1983 | | NAKINA |
| 8 | GM | Gainesville Midland R.R. Co. | 1/75-1/80; eliminated 1/83 | | NRHS |
| 9 | GM | GAINESVILLE MIDLAND RAILROAD CO. | | | PWRC |
| 10 | GM&N | Gulf, Mobile & Northern R.R. (Co.) | 7/1923-7/1954 | | NAKINA |
| 11 | GM&N | Gulf, Mobile & Northern R.R. | 4/38-1/52 | | NRHS |
| 12 | GM&N | GULF, MOBILE & NORTHERN RAILROAD CO. | | | PWRC |
| 13 | GM&O | Gulf, Mobile & Ohio R.R. | 1/1941-10/1966 | | NAKINA |
| 14 | GM&O | Gulf, Mobile & Ohio R.R. | 1/52-10/66 | | NRHS |
| 15 | GM&O | GULF, MOBILE & OHIO RAILROAD | | | PWRC |
| 16 | GMA | Gama Aviation Ltd. | Callsign: Gama, ICAO designator changed from GOG | GB | AVCODES |
| 17 | GMA | Gama Aviation | | | ICAO1 |
| 18 | GMA | GEORGIA MARBLE | | | PWRC |
| 19 | GMAC | GMA COVER CORPORATION | | | SCAC4 |
| 20 | GMAD | GMA ACCESSORIES INC | | | SCAC4 |
| 21 | GMAE | GRUBB, MICHAEL T | | | SCAC4 |
| 22 | GMAM | GRAEBEL MID-ATLANTIC MOVERS - CHANT | | | SCAC4 |
| 23 | GMAN | GARMAN TRUCKING COMPANY, INC | | | SCAC1 |
| 24 | GMAT | GLOBAL LAND MATERIALS INC | | | SCAC4 |
| 25 | GMAW | GILLIANO MOTOR TRANSPORT INC | | | SCAC4 |
| 26 | GMAY | GARCIA, MANUEL | | | SCAC4 |
| 27 | GMAZ | GENERAL MOTORS AUTO TERMINAL | | | PWRC |
| 28 | GMB | Beriev Aviation Scientific Technical Complex, Joint Stock Company | Callsign: Beriev-Air, | RUS | AVCODES |
| 29 | GMB | GM Buses | City: Manchester | GB | TRAFFIC |
| 30 | GMB | Flytoget AS | | NO | VKM |
| 31 | GMBB | GONZALEZ, MARIA | | | SCAC4 |
| 32 | GMBD | G & M TRUCKING LLC | | | SCAC4 |
| 33 | GMBE | GAMBLER EXPRESS INC | | | SCAC4 |
| 34 | GMBH | GMB HEAVY INDUSTRIES INC | | | SCAC4 |
| 35 | GMBL | G & M FARMS | | | SCAC4 |
| 36 | GMBL | Gardena Municipal Bus Lines | | US-CA | TRAFFIC |
| 37 | GMBM | GLOBAL MARINE SHIPPING SA | | | SCAC4 |
| 38 | GMBN | GM Buses North | City: Manchester | GB | TRAFFIC |
| 39 | GMBQ | GOLD MEDAL TRUCKING INC | | | SCAC4 |
| 40 | GMBS | Greater Manchester Buses South Ltd. | | GB | TRAFFIC |
| 41 | GMBT | GK INTERMODAL INC | | | SCAC4 |
| 42 | GMC | General Motors Corporation | Callsign: General Motors, | USA | AVCODES |
| 43 | GMC | General Motors | | | ICAO1 |
| 44 | GMC | GENERAL MOTORS CORP. | | | PWRC |
| 45 | GMC | General Motors Corp. | | USA | TRAFFIC |
| 46 | GMCA | GMC AIR | | | SCAC4 |
| 47 | GMCB | GLASS & MIRROR CRAFT LLC AND | | | SCAC4 |
| 48 | GMCC | GMC INC | | | SCAC4 |
| 49 | GMCD | GARCIA MARTINEZ, CECILIA | | | SCAC4 |
| 50 | GMCG | GILMORE TRUCKING LLC | | | SCAC4 |
| 51 | GMCI | GESTION MICHEL CHICOINE INC | | | SCAC4 |
| 52 | GMCJ | GM CARRIERS INC | | | SCAC4 |
| 53 | GMCK | G & M TRUCKING COMPANY | | | SCAC4 |
| 54 | GMCL | GMC LOGISTICS CO LTD | | | SCAC4 |
| 55 | GMCO | GARCIA MARTINEZ, OSCAR | | | SCAC4 |
| 56 | GMCP | GENERAL MARITIME MANAGEMENT LLC | | | SCAC4 |
| 57 | GMCR | GAMA TRUCKING | | | SCAC4 |
| 58 | GMCS | GOMEZ CASTRO, VICENTE | | | SCAC4 |
| 59 | GMCT | GALATEIA MARITIME CORPORATION | | | SCAC4 |
| 60 | GMCU | PEACOCK CONTAINER PTE. LTD. | | SGP | BIC |
| 61 | GMCX | General Motors Corp. | added 10/1979; 1/1980; eliminated 7/1987 | | NAKINA |
| 62 | GMCX | General Manufacturing Co. | 8/1920 | | NAKINA |
| 63 | GMCX | General Motors Corp. | 1/80; eliminated 7/87 | | NRHS |
| 64 | GMCX | *GENERAL MANUFACTURING CO. | | | PWRC |
| 65 | GMCX | *GENERAL MOTORS CORP. | | | PWRC |
| 66 | GMCX | General Motors Corporation | | | RSRV |
| 67 | GMCY | GORDON MANUFACTURING COMPANY | | | SCAC4 |
| 68 | GMD | Guruge Airlines Ltd. | Callsign: Guruge Air, | CL | AVCODES |
| 69 | GMD | Gulf Med Aviation Services Ltd. | Callsign: Gulf Med, | M | AVCODES |
| 70 | GMDC | GRANMIN SA DE CV | | | SCAC4 |
| 71 | GMDF | G M D F TRANSPORT INC | | | SCAC4 |
| 72 | GMDI | GREENMANS MOVING & DELIVERY INC | | | SCAC4 |
| 73 | GMDJ | GARAGE MORIN DE ST-JEAN INC | | | SCAC4 |
| 74 | GMDK | GMD TRUCKING LTD | | | SCAC4 |
| 75 | GMDM | GRUPO MACRO DIESEL MONTERREY SA DE | | | SCAC4 |
| 76 | GMDU | GEMADEPT CORPORATION | | VN | BIC |
| 77 | GMDU | GENERAL FORWARDING & AGENCY CORPORA | | | SCAC4 |
| 78 | GMDV | GRUPO M H DIVISION TRANSPORTES SA D | | | SCAC4 |
| 79 | GMDX | GM DIESEL DIVISION/GM CANADA | | | PWRC |
| 80 | GMDX | General Motors Diesel Canada | | | RSRV |
| 81 | GMDX | GM DIESEL DIVISION/GM CANADA | | | SCAC4 |
| 82 | GME | Aguilas Mayas Internacional | Callsign: Mayan Eagles, | GCA | AVCODES |
| 83 | GME | GM Helicopters 102 NE Co., Ltd. | Callsign: Globe Meridian, | LAO | AVCODES |
| 84 | GME | Aguilas Mayas Internacional | | | ICAO1 |
| 85 | GME | Georgsmarienhütten-Eisenbahn und Transport GmbH | Real: GET | D | TRAFFIC |
| 86 | GMEA | GRUPO MEDINA Y ASOCIADOS | | | SCAC4 |
| 87 | GMED | GESTION MADE EXPRESS INC | | | SCAC4 |
| 88 | GMEF | GAGNON, MARINA ET FILS LTEE | | | SCAC4 |
| 89 | GMEO | GME TRANSPORTATION | | | SCAC4 |
| 90 | GMEQ | GLOVIS ALABAMA LLC | | | SCAC4 |
| 91 | GMER | GATTERDAM ELECTRIC | | | SCAC4 |
| 92 | GMF | GESTION DE MAQUINARIA FERROVIARIA | | ES | VKM |
| 93 | GMFD | GENERAL METAL FABRICATION LTD | | | SCAC4 |
| 94 | GMFE | GREEN MOUNTAIN FEEDS INC | | | SCAC4 |
| 95 | GMFI | GARDNER MOTOR FREIGHT INC | | | SCAC4 |
| 96 | GMFO | G & M FUEL CO INC | | | SCAC4 |
| 97 | GMFQ | GREEN MARINE FUELS INC | | | SCAC4 |
| 98 | GMFR | G M FREIGHT INC | | | SCAC4 |
| 99 | GMFT | GM FREIGHT SYSTEMS | | | SCAC4 |
| 100 | GMFZ | GENERAL MOTORS FISHER BODY DIV. | | | PWRC |
