| 1 | GTI | Atlas Air, Inc. | IATA: 5Y, Callsign: Giant, IATA Prefix: 369, | USA | AVCODES |
| 2 | GTI | Atlas Air | IATA: 5Y | | ICAO1 |
| 3 | GTIA | GT EXPRESS TRANSPORT | | | SCAC1 |
| 4 | GTID | GLASS TRUCKING INC | | | SCAC4 |
| 5 | GTIF | GRIFFIN TRANSPORTATION INC | | | SCAC4 |
| 6 | GTII | GHOST TRUCKING INC | | | SCAC4 |
| 7 | GTIJ | GREER TRUCKING INC | | | SCAC4 |
| 8 | GTIL | G T I ROLL TRANSPORTATION SERVICES | | | SCAC4 |
| 9 | GTIQ | G T I | | | SCAC4 |
| 10 | GTIS | Guilford Transportation Industries (for tariff identification only) | 1/1994-7/2005 (not listed) | | NAKINA |
| 11 | GTIS | Guilford Transportation Industries (for tariff identification only) | 1/94-7/2000 | | NRHS |
| 12 | GTIS | GUILFORD TRANSPORTATION INDUSTRIES (FOR TARIFF IDENTIFICATION ONLY) | | | PWRC |
| 13 | GTIS | Guilford Transportation Industries | | | RSRV |
| 14 | GTIT | G T I TRANSPORT INC | | | SCAC4 |
| 15 | GTIU | MSC- MEDITERRANEAN SHIPPING COMPANY S.A. | | CH | BIC |
| 16 | GTIU | GENERAL ELECTRIC CAPITAL CORPORATIO | | | SCAC4 |
| 17 | GTIV | GORDON TRUCKING INC (DEDICATED FLEE | | | SCAC4 |
| 18 | GTIY | GROTE INDUSTRIES CO | | | SCAC4 |
| 19 | GTIZ | G. T. INTERMODAL U.S.A. | | | PWRC |
| 20 | GTIZ | G. T. Intermodal USA | | | RSRV |
| 21 | GTIZ | G T INTERMODAL USA | | | SCAC4 |
