| 1 | GBL | GB Airways Ltd. | IATA: GT, Callsign: GeeBee Airways, IATA Prefix: 171, Merged into Easyjet on 30 March, 2008. ICAO callsign changed from Gibair | GB | AVCODES |
| 2 | GBL | GB Airways Ltd. | IATA: GT, Callsign: Gibair, IATA Prefix: 171, Name changed from Gibraltar Airways Ltd. | GB | AVCODES |
| 3 | GBL | UAB Global Airways | Callsign: Litglobe, | LT | AVCODES |
| 4 | GBL | GB Airways | IATA: GT | | ICAO1 |
| 5 | GBL | Green Bus Lines | | USA | TRAFFIC |
| 6 | GBLA | GLOBAL FREIGHT TRANSFER CORP | | | SCAC4 |
| 7 | GBLB | GARBO LOBSTER COMPANY INC | | | SCAC4 |
| 8 | GBLD | GLOBAL DRIVER SERVICES | | | SCAC4 |
| 9 | GBLF | GLOBAL FREIGHT MANAGEMENT INC | | | SCAC4 |
| 10 | GBLG | GENES CHARTERS | | | SCAC4 |
| 11 | GBLH | GLOBAL SHIPPING COMPANY LLC | | | SCAC4 |
| 12 | GBLN | GLOBE LOGISTICS INC | | | SCAC4 |
| 13 | GBLos | Geschw Balter Bauunternehmung GmbH | | DE | VKM |
| 14 | GBLP | GLOBAL LOGISTICS SOLUTIONS COMPANY | | | SCAC4 |
| 15 | GBLR | GABLER TRUCKING INC | | | SCAC4 |
| 16 | GBLS | G & B LOAD TRANSPORT LLC | | | SCAC4 |
| 17 | GBLU | SAFMARINE CONTAINER LINES NV | | | SCAC4 |
| 18 | GBLV | GROFF, BARRY L | | | SCAC4 |
| 19 | GBLW | GO BEST LOGISTICS INC | | | SCAC4 |
| 20 | GBLY | GRUMLEY BROKERAGE LLC | | | SCAC4 |
