| 701 | GBMU | BOURGEY MONTREUIL S.A | | F | BIC |
| 702 | GBMU | BOURGEY MONTREUIL SA | | | SCAC4 |
| 703 | GBMX | Grain Belt Mills Co. | 8/1920-7/1923 | | NAKINA |
| 704 | GBMX | GRAIN BELT MILLS CO. | | | PWRC |
| 705 | GBN | Atlantic Airlines | Callsign: Atlantic Gabon, | G | AVCODES |
| 706 | GBN | Atlantic Airlines | | | ICAO1 |
| 707 | GBND | GARCIA, BEN D TRUCKING | | | SCAC4 |
| 708 | GBNF | GIBBONS, FLOYD TRUCKING | | | SCAC4 |
| 709 | GBNS | GLOBETRANS INTERNATIONAL | | | SCAC4 |
| 710 | GBO | Ogooue Air Cargo | | G | AVCODES |
| 711 | GBO | Ogooue Air Cargo | | | ICAO1 |
| 712 | GBOF | GLEN BAY OF LINCOLN COUNTY INC | | | SCAC4 |
| 713 | GBOL | G & B ENERGY | | | SCAC4 |
| 714 | GBOM | GLOBAL OIL CO INC | | | SCAC4 |
| 715 | GBOR | | City: Göteborg | S | TRAFFIC |
| 716 | GBOT | GROB, O TRUCKING INC | | | SCAC4 |
| 717 | GBOY | GRABLE OIL COMPANY | | | SCAC4 |
| 718 | GBOY | Golden Boy | | GB | TRAFFIC |
| 719 | GBPE | GLOBE PETROLEUM INC | | | SCAC4 |
| 720 | GBPL | GREENSBORO SUPPLY INC | | | SCAC4 |
| 721 | GBPR | GRAND BEND PRODUCE CO LTD | | | SCAC4 |
| 722 | GBPS | GLOBAL PRODUCE SALES INC | | | SCAC4 |
| 723 | GBQ | Gambia Bird Airlines | IATA: 3G, Callsign: Gambia Bird, IATA Prefix: 213, Commenced operations on 22 October 2012. Ceased all operations in December 2014. Aircraft wet leased from Gemania. Main share holder Germania Express | WAG | AVCODES |
| 724 | GBR | Rader Aviation, Inc. | Callsign: Greenbrier Air, | USA | AVCODES |
| 725 | GBR | Rader Aviation | | | ICAO1 |
| 726 | GBRA | GRABER AGRICULTURAL SERVICE | | | PWRC |
| 727 | GBRA | GARCIA BARRERA, MIGUEL ANGEL | | | SCAC4 |
| 728 | GBRC | GLOBAL REEFER CARRIERS | | | SCAC1 |
| 729 | GBRC | GLOBAL REEFERS CARRIERS | | | SCAC4 |
| 730 | GBRCT | Royal Corps of Transport | Real: RCT | GB | TRAFFIC |
| 731 | GBRD | GROBER INC | | | SCAC4 |
| 732 | GBRE | Groß Bieberau-Reinheimer Eisenbahn GmbH | Reinheim | D | privat-bahn.de |
| 733 | GBRF | GIUMARRABROS FRUIT CO INC | | | SCAC4 |
| 734 | GBRF | GB Railfreight | GB Railfreight (GBRf) is a British freight operating company. It is part of First Group. | GB | TRAFFIC |
| 735 | GBRF | GB Railfreight | | UK | VKM |
| 736 | GBRI | GEORGE, BRIAN D TRUCKING & ENT LTD | | | SCAC4 |
| 737 | GBRK | GARBER BROKERAGE INC | | | SCAC4 |
| 738 | GBRN | GBR TRANSPORT INC | | | SCAC4 |
| 739 | GBRO | GULACHA BROTHERS TRUCKING INC | | | SCAC4 |
| 740 | GBRP | GRIZZLY BEAR ENTERPRIZES | | | SCAC4 |
| 741 | GBRR | GLOBAL REMANUFACTURING | | | SCAC4 |
| 742 | GBRT | GILBERT TRUCKING | | | SCAC1 |
| 743 | GBRU | GREENBRIER LEASING CORP | | | SCAC4 |
| 744 | GBRX | Greenbrier Management Services, LLC | added 7/2005; 7/2005 | | NAKINA |
| 745 | GBRX | Greenbrier Leasing Corp. | added 1/1974; 1/1975-7/2000; eliminated 7/2005 | | NAKINA |
| 746 | GBRX | Greenbrier Leasing Corp. | added 1/74; 1/75-7/2000 | | NRHS |
| 747 | GBRX | GREENBRIER MANAGEMENT SERVICES [GREENBRIER LEASING CORPORATION] | | | PWRC |
| 748 | GBRX | Greenbrier Leasing Corporation | | | RSRV |
| 749 | GBRX | GREENBRIER MANAGEMENT SERVICES LLC | | | SCAC4 |
| 750 | GBRY | Gettysburg Ry. | 7/2000 | | NAKINA |
| 751 | GBRY | Gettysburg Ry. | Jul-00 | | NRHS |
| 752 | GBRY | GETTYSBURG RAILWAY | | | PWRC |
| 753 | GBRY | Gettysburg Railway | | | RSRV |
| 754 | GBRZ | GREENBRIER LEASING CORPORATION | | | PWRC |
| 755 | GBRZ | Greenbrier Leasing Corporation | | | RSRV |
| 756 | GBRZ | GREENBRIER CAPITAL CORPORATION | | | SCAC4 |
| 757 | GBS | Global Air Servies Nigeria Ltd. | Callsign: Global Serve, | WAN | AVCODES |
| 758 | GBS | Global Air Services Nigeria | | | ICAO1 |
| 759 | GBS | Gürbetal-Bern-Schwarzenburg-Bahn | | CH | TRAFFIC |
| 760 | GBS | Gleisbau Sabrodt GmbH | | DE | VKM |
| 761 | GBSC | GILBERTS SERVICE OIL CO INC | | | SCAC4 |
| 762 | GBSD | GOVERNOR BUSINESS SOLUTIONS | | | SCAC4 |
| 763 | GBSE | GILBERTSON ENTERPRISES LTD | | | SCAC4 |
| 764 | GBSH | GLOBAL SHIPPING | | | SCAC4 |
| 765 | GBSJ | GBS & SONS FREIGHT INC | | | SCAC4 |
| 766 | GBSL | GLOBAL STAR TRANSPORT | | | SCAC4 |
| 767 | GBSM | GIUSEPPE BOTTIGLIERI SHIPPING COMPA | | | SCAC4 |
| 768 | GBSN | GLOBAL SHIPMANAGEMENT | | | SCAC4 |
| 769 | GBSO | GIBSON WELDING LTD | | | SCAC4 |
| 770 | GBSR | GLOBAL SHIPPING SERVICES LLC | | | SCAC4 |
| 771 | GBSS | GLOBAL SERVICE ASSOCIATES | | | SCAC4 |
| 772 | GBST | G B S & SONS TRUCKING LTD | | | SCAC4 |
| 773 | GBSU | MOMENTIVE PERFORMANCE MATERIALS GMBH | | D | BIC |
| 774 | GBSU | GE BAYER SILICONES GMBH & CO KG | | | SCAC4 |
| 775 | GBSV | GARCIA BENAVIDES, SERGIO ROLANDO | | | SCAC4 |
| 776 | GBSX | Great Bear Spring Co. | 7/1935-7/1954; eliminated 10/1957 | | NAKINA |
| 777 | GBSX | Great Bear Spring Co. | 4/38-1/52; eliminated 10/57 | | NRHS |
| 778 | GBSX | GREAT BEAR SPRING CO. | | | PWRC |
| 779 | GBSY | GENERAL BIODIESEL SEATTLE LLC | | | SCAC4 |
| 780 | GBT | Gold Belt Air Transport, Inc. | Callsign: Goldbelt, | CDN | AVCODES |
| 781 | GBT | A-Jet Aviation Aircraft Management GmbH | Callsign: Globetrotter, Ceased operations. ICAO designator changed from XXA. | A | AVCODES |
| 782 | GBT | Gold Belt Air Transport | | | ICAO1 |
| 783 | GBTC | GABY TRADING INC | | | SCAC4 |
| 784 | GBTH | GALBRAITH, JAMES & SONS | | | SCAC1 |
| 785 | GBTI | GLB TRUCKING LLC | | | SCAC4 |
| 786 | GBTJ | GLOBAL TRANSPORTATION SERVICES INC | | | SCAC4 |
| 787 | GBTK | GOLDEN BAY TRUCKING | | | SCAC4 |
| 788 | GBTL | G & B TRANSPORTATION LTD | | | SCAC4 |
| 789 | GBTM | GLORY BOUND TRUCKING | | | SCAC4 |
| 790 | GBTO | GIESBRECHT, NORMAN | | | SCAC4 |
| 791 | GBTP | G & B TRANSPORT LTD | | | SCAC4 |
| 792 | GBTQ | GLOBAL TRANSPORTATION SOLUTIONS | | | SCAC4 |
| 793 | GBTT | GLOBAL TRANSPORTATION USA | | | SCAC4 |
| 794 | GBTU | GUIDO BERNARDINI SRL | | I | BIC |
| 795 | GBTX | GBTX LEASING, LLC | | | PWRC |
| 796 | GBTX | GBTX LEASING LLC | | | SCAC4 |
| 797 | GBTY | GBTI INC | | | SCAC4 |
| 798 | GBU | Transports Aériens de La Guinee-Bissau | Callsign: Transbissau, | GW | AVCODES |
| 799 | GBU | Linhas Aereas da Guine Bissau | | GW | AVCODES |
| 800 | GBUI | GILLBUILT TRANSPORTATION INC | | | SCAC4 |
