| 1 | GK | Go One Airways | IATA Prefix: 274, Designator GK reinstatd by IATA | GB | AVCODES |
| 2 | GK | Laker Airways | ICAO: LAK, Callsign: Laker, Ceased operations at 09:30 am on 05 February 1982. | GB | AVCODES |
| 3 | GK | Guy America Airways | ICAO: GAM, Callsign: Guyam, | USA | AVCODES |
| 4 | GK | Miniliner Srl | ICAO: MNL, Callsign: Miniliner, Designator GL recalled by IATA | I | AVCODES |
| 5 | GK | Jetstar Japan | ICAO: JJP, Callsign: Orange Liner, | J | AVCODES |
| 6 | GKA | U S Army Parachute Team | Callsign: Golden Knights, | USA | AVCODES |
| 7 | GKA | US Army Parachute Team | | | ICAO1 |
| 8 | GKB | Geilenkirchener Kreisbahn | Geilenkirchen | D | privat-bahn.de |
| 9 | GKB | Graz-Köflacher Eisenbahn | | A | TRAFFIC |
| 10 | GKB | Graz-Köflacher Eisenbahn | | AT | VKM |
| 11 | GKBI | GREYLAWN BROKERAGE INC | | | SCAC4 |
| 12 | GKBO | GIANT LOCK BOX | | | SCAC4 |
| 13 | GKCH | GOIN KOEHN CO | | | SCAC4 |
| 14 | GKCM | GRAEBEL KANSAS CITY MOVERS INC | | | SCAC4 |
| 15 | GKCN | G & K SERVICES CANADA INC | | | SCAC4 |
| 16 | GKCO | GROTHAUS TRUCKING CO | | | SCAC4 |
| 17 | GKCP | GIGI'S TRUCKING CORP | | | SCAC4 |
| 18 | GKCS | GEOKINETICS EXPLORATION INC | | | SCAC4 |
| 19 | GKCT | GUETHLER, K & C TRANSPORT LLC | | | SCAC4 |
| 20 | GKDT | G & K SERVICES OF CANADA INC | | | SCAC4 |
| 21 | GKEF | GROSS, KEVIN | | | SCAC4 |
| 22 | GKES | GLOBAL LINK ENTERPRISES | | | SCAC4 |
| 23 | GKFB | GK FLATBED SERVICES | | | SCAC4 |
| 24 | GKFP | GULICK FOREST PRODUCTS LTD | | | SCAC4 |
| 25 | GKHD | GRAHAM, ROB TRUCKING INC | | | SCAC4 |
| 26 | GKHL | GARCIA, V TRUCKING INC | | | SCAC4 |
| 27 | GKHT | GAKHAL TRANSPORT INC | | | SCAC4 |
| 28 | GKIB | GILBERT TRUCKING INC | | | SCAC4 |
| 29 | GKIC | GABRIEL, KAMRYN INCORPORATED | | | SCAC4 |
| 30 | GKIN | GRONKE TRUCKING LLC | | | SCAC4 |
| 31 | GKIS | GALERIE KLIMANTIRIS INC | | | SCAC4 |
| 32 | GKL | GKLokservice GbR | Düsburg (G=Götz, K=Koyun) | D | privat-bahn.de |
| 33 | GKLC | GK LOGISTICS LLC | | | SCAC4 |
| 34 | GKLL | GREAT LAKES LOGISTICS INC | | | SCAC4 |
| 35 | GKLT | GEE, K & L TRUCKING | | | SCAC4 |
| 36 | GKLU | LASLAND SP Z.O.O | | PL | BIC |
| 37 | GKLX | Golden Peanut Co. | 7/2005 (not listed) | | NAKINA |
| 38 | GKLX | Gold Kist Inc. | added 7/1981; 1/1994-7/2000; eliminated 4/2002 | | NAKINA |
| 39 | GKLX | Gold Kist Inc. | added 7/81; 1/94-7/2000 | | NRHS |
| 40 | GKLX | *GOLD KIST INC. | | | PWRC |
| 41 | GKLX | +GOLDEN PEANUT CO. | | | PWRC |
| 42 | GKLX | Gold Kist | | | RSRV |
| 43 | GKLX | GOLDEN PEANUT COMPANY | | | SCAC4 |
| 44 | GKMA | GRAD, KEVIN & MARLA | | | SCAC4 |
| 45 | GKMF | GKM FABRICATION INC | | | SCAC4 |
| 46 | GKN | GKN Group Services Ltd. | IATA: KN, Callsign: Guest Keen, | GB | AVCODES |
| 47 | GKNC | GRANITE KENEBEC 1992 | | | SCAC4 |
| 48 | GKNF | G K N FREIGHT SERVICES INC | | | SCAC4 |
| 49 | GKNT | GK & SONS TRUCKING | | | SCAC4 |
| 50 | GKOA | GONZALEZ, KORINA | | | SCAC4 |
| 51 | GKOC | GILCO TRUCKING COMPANY INC (SAVANNA | | | SCAC4 |
| 52 | GKOE | GRECKO TRUCKING INC | | | SCAC4 |
| 53 | GKOI | GLOCKNER OIL COMPANY INC | | | SCAC4 |
| 54 | GKOL | GREKA OIL & GAS | | | SCAC4 |
| 55 | GKRU | GRUZOVAYA KORPORATSIYA | | RUS | BIC |
| 56 | GKS | Hans Airways Limited | Callsign: Swarn, | GB | AVCODES |
| 57 | GKTC | G & K TRUCKING INC | | | SCAC4 |
| 58 | GKTE | GUAKETE TRANSPORT INC | | | SCAC4 |
| 59 | GKTM | G & K TRUCKING INC | | | SCAC4 |
| 60 | GKTS | G K GRANITES (P) LTD | | | SCAC4 |
| 61 | GKTW | GERLOCK TOWING | | | SCAC4 |
| 62 | GKTY | GK TRUCKING | | | SCAC4 |
| 63 | GKV | GKV-Avia | | AM | AVCODES |
| 64 | GKW | | | PL | TRAFFIC |
| 65 | GKWY | GOODELL, KEVIN WAYNE | | | SCAC4 |
| 66 | GKXL | GTX | | | SCAC4 |
| 67 | GKY | Gama Aviation (Cayman) SEZC | Callsign: Gama Cayman, | CAY | AVCODES |
