| 1 | GMD | Guruge Airlines Ltd. | Callsign: Guruge Air, | CL | AVCODES |
| 2 | GMD | Gulf Med Aviation Services Ltd. | Callsign: Gulf Med, | M | AVCODES |
| 3 | GMDC | GRANMIN SA DE CV | | | SCAC4 |
| 4 | GMDF | G M D F TRANSPORT INC | | | SCAC4 |
| 5 | GMDI | GREENMANS MOVING & DELIVERY INC | | | SCAC4 |
| 6 | GMDJ | GARAGE MORIN DE ST-JEAN INC | | | SCAC4 |
| 7 | GMDK | GMD TRUCKING LTD | | | SCAC4 |
| 8 | GMDM | GRUPO MACRO DIESEL MONTERREY SA DE | | | SCAC4 |
| 9 | GMDU | GEMADEPT CORPORATION | | VN | BIC |
| 10 | GMDU | GENERAL FORWARDING & AGENCY CORPORA | | | SCAC4 |
| 11 | GMDV | GRUPO M H DIVISION TRANSPORTES SA D | | | SCAC4 |
| 12 | GMDX | GM DIESEL DIVISION/GM CANADA | | | PWRC |
| 13 | GMDX | General Motors Diesel Canada | | | RSRV |
| 14 | GMDX | GM DIESEL DIVISION/GM CANADA | | | SCAC4 |
