| 1 | GB | ABX Air, Inc. | ICAO: ABX, Callsign: Abex, IATA Prefix: 832, Name changed from Airborne Express, Inc. | USA | AVCODES |
| 2 | GB | Airborne Express, Inc. | ICAO: ABX, Callsign: Abex, IATA Prefix: 832, Name changed to ABX Air, Inc. Designator AE recalled by IATA | USA | AVCODES |
| 3 | GB | Air Glaciers | ICAO: AGV, Callsign: Alpha Golf Vict, IATA designator changed to 7T* | CH | AVCODES |
| 4 | GB | Great Barrier Airlines | ICAO: AFW, | NZ | AVCODES |
| 5 | GB | Société de Transports Aériens du Gabon | | G | AVCODES |
| 6 | GB | Globus LLC | IATA designator changed to GH | RUS | AVCODES |
| 7 | GB | Transportes Aereos da Guine-Bissau | Callsign: Transbissau, | GW | AVCODES |
| 8 | GB | unknown in Great Britain | | GB | TRAFFIC |
| 9 | GB&W | Green Bay & Western R.R. Co. | 8/1920-7/1930 & 7/1936 | | NAKINA |
| 10 | GB&W | GREEN BAY & WESTERN RAILROAD CO. | | | PWRC |
| 11 | GBA | Gulf Air Bahrain B.S.C. | Callsign: Gulf Bahrain, | BRN | AVCODES |
| 12 | GBA | Georgian Bay Airways | Callsign: Georgian Bay, | CDN | AVCODES |
| 13 | GBA | Gulf Air Bahrain | IATA: GF | | ICAO1 |
| 14 | GBAC | GURRISI BROTHERS AUTO & TRUCK SALES | | | SCAC4 |
| 15 | GBAD | GARCIA BLANCAS, AMADO | | | SCAC4 |
| 16 | GBAE | G & B FARMS LTD | | | SCAC4 |
| 17 | GBAG | Gelsenkirchener Bergwerks-AG | | D | TRAFFIC |
| 18 | GBAJ | GBA TRANSPORT LLC | | | SCAC4 |
| 19 | GBAK | G B TRANSPORT LLC | | | SCAC4 |
| 20 | GBAM | GLOBAL MESSENGER CORPORATION | | | SCAC4 |
| 21 | GBAN | GLOBAL TRANS AMERICA INC | | | SCAC4 |
| 22 | GBAP | GB AND SONS TRANSPORT INC | | | SCAC4 |
| 23 | GBAT | GLOBAL LOGISTICS SOLUTIONS | | | SCAC4 |
| 24 | GBAU | BAUTRU ET CIE | | | SCAC3 |
| 25 | GBB | Global Aviation Operations (PTY) Ltd | IATA: QG, Designator QG recalled by IATA | ZA | AVCODES |
| 26 | GBB | Global Aviation Operations (Pty) Ltd | IATA: GE, Callsign: Globe, Designator QG recalled by IATA | ZA | AVCODES |
| 27 | GBB | Global Aviation Operations | | | ICAO1 |
| 28 | GBBC | GOLDEN BRAND BOTTLING CO INC | | | SCAC4 |
| 29 | GBBD | GLOBAL BEST BEAUTY TRADING LTD | | | SCAC4 |
| 30 | GBBG | GLOBAL BRILLIANT LOGISTICS CORP | | | SCAC4 |
| 31 | GBBJ | Grängesbergsbanornas Järnvägsmuseum | | SE | VKM |
| 32 | GBBL | GRIBBLE TRANSPORT INC | | | SCAC4 |
| 33 | GBBM | GRAEBEL NEW ENGLAND MOVERS INC | | | SCAC4 |
| 34 | GBBO | GIBBONS, JOHN PONTIAC BUICK GMC LTD | | | SCAC4 |
| 35 | GBBQ | G B T | | | SCAC4 |
| 36 | GBBR | GRUBB TRUCKING | | | SCAC4 |
| 37 | GBBY | GALIB ENTERPRISES LTD | | | SCAC4 |
| 38 | GBC | Globe Air Cargo | Callsign: Globe Cargo, | AG | AVCODES |
| 39 | GBCA | GLOBAL CONSOLIDATION SERVICES | | | SCAC1 |
| 40 | GBCB | GIBBS BROTHERS CONSTRUCTION INC | | | SCAC4 |
| 41 | GBCC | GESTION SAGBY INC | | | SCAC4 |
| 42 | GBCD | GIESBRECHT, SEAN | | | SCAC4 |
| 43 | GBCE | GREEN BELT CARRIERS | | | SCAC4 |
| 44 | GBCF | GLOBAL CFS INC | | | SCAC4 |
| 45 | GBCI | GRANI-BOIS CONCEPT INC | | | SCAC4 |
| 46 | GBCJ | GRANNAS BROS CONTRACTING CO INC | | | SCAC4 |
| 47 | GBCM | GIBCO MOTOR EXPRESS LLC | | | SCAC4 |
| 48 | GBCN | GLOBE COM LINES INC. | | | SCAC4 |
| 49 | GBCP | GLOBAL COMPANIES LLC | | | SCAC4 |
| 50 | GBCQ | GENERAL BINDING CORPORATION | | | SCAC4 |
| 51 | GBCR | DSR SHIPPING CO. INC. | | | SCAC1 |
| 52 | GBCT | GRAEBEL CONNECTICUT MOVERS INC | | | SCAC4 |
| 53 | GBCU | GLOBAL CONTAINER CONCEPTS | | | SCAC4 |
| 54 | GBCV | GLOBAL COURIER SERVICE LTD | | | SCAC4 |
| 55 | GBCX | Genesee Brewing Co. (Merchants Despatch, Inc.) | 7/1935 | | NAKINA |
| 56 | GBCY | GLOBAL CCSF INC | | | SCAC4 |
| 57 | GBDB | GABER DISTRIBUTORS | | | SCAC4 |
| 58 | GBDK | GOBIND TRUCKING INC | | | SCAC4 |
| 59 | GBDM | GRAEBEL/DENVE | | | SCAC4 |
| 60 | GBDS | GULBRANDSENS | | | SCAC4 |
| 61 | GBDY | GB SPECIALTY TRUCKING LLC | | | SCAC4 |
| 62 | GBE | Gabon Express | Callsign: Gabex, | G | AVCODES |
| 63 | GBE | Gabon Express | | | ICAO1 |
| 64 | GBEA | GILBERT COMPANY, THE | | | SCAC4 |
| 65 | GBEC | GLOBAL ENTERPRISES & LOGISTICS INC | | | SCAC4 |
| 66 | GBEF | G B ENTERPRISES OF FLAT ROCK | | | SCAC4 |
| 67 | GBEG | GLOBAL EAGLE TRANSPORTATION INC | | | SCAC4 |
| 68 | GBEK | GRAEBEL ERICKSON MOVERS INC | | | SCAC4 |
| 69 | GBEM | GRAEBEL/EAS | | | SCAC4 |
| 70 | GBEN | GARRETSON, BILL ENTERPRISES LLC | | | SCAC4 |
| 71 | GBEQ | G B EQUIPEMENTS INC | | | SCAC4 |
| 72 | GBET | GROBE FRUIT FARM LTD | | | SCAC4 |
| 73 | GBEU | SAFMARINE CONTAINER LINES NV | | | SCAC4 |
| 74 | GBEV | GRAEBEL DALLAS MOVERS INC | | | SCAC4 |
| 75 | GBF | North Air LLC | Callsign: Gicon, | KZ | AVCODES |
| 76 | GBFA | GIBSON FARMERS CO-OP | | | SCAC4 |
| 77 | GBFC | GBF ENTERPRISES INC | | | SCAC4 |
| 78 | GBFL | GLEIM BIO FUELS INC | | | SCAC4 |
| 79 | GBFO | GRANT BROTHERS FUEL OIL INC | | | SCAC4 |
| 80 | GBFV | GLOBAL FLEET SERVICE SA DE CV | | | SCAC4 |
| 81 | GBFW | GLOBAL FAIRWAYS INC | | | SCAC4 |
| 82 | GBFX | Green Bay Food Co. | 7/1935-7/1937; 1/1950-7/1965; eliminated 7/1966 | | NAKINA |
| 83 | GBFX | Green Bay Food Co. | 1/52-7/65; eliminated 7/66 | | NRHS |
| 84 | GBFX | GREEN BAY FOOD CO. | | | PWRC |
| 85 | GBFY | GLOBAL INFINITY TRANSPORT INC | | | SCAC4 |
| 86 | GBG | Omega Copters | Callsign: Omega Copters, | GE | AVCODES |
| 87 | GBG | Global Jet Limited | IATA: 7G, Designator 7G* recalled by IATA | UAE | AVCODES |
| 88 | GBG | GullivAir Ltd. | IATA: G2, Callsign: Vagabond, ICAO designator changed from TJJ. | BG | AVCODES |
| 89 | GBGB | GLOBAL TRADING & LOGISTICS INC | | | SCAC4 |
| 90 | GBGC | GLOBAL GOODS CORP | | | SCAC4 |
| 91 | GBGD | GLOBAL AGRICULTURE TRANS-LOADING IN | | | SCAC4 |
| 92 | GBGE | GLOBAL GREETINGS | | | SCAC4 |
| 93 | GBGG | GLOBAL LOGISTICS CONSULTING INC | | | SCAC4 |
| 94 | GBGI | G & B LOGISTICS | | | SCAC4 |
| 95 | GBGL | GIBBONS, G L TRAILER | | | SCAC4 |
| 96 | GBGN | GOLDING BARGE LINE INC | | | SCAC4 |
| 97 | GBGO | GREENE BRO L P GAS & OIL CO | | | SCAC4 |
| 98 | GBGQ | GILL BROTHERS LOGISTICS INC | | | SCAC4 |
| 99 | GBGR | GROUPE BERGER | | | SCAC4 |
| 100 | GBGS | GILBERT, G B SALES LTD | | | SCAC4 |
