| 1 | GSL | Geographic Air Surveys Ltd. | Callsign: Survey-Canada, | CDN | AVCODES |
| 2 | GSL | Geographic Air Surveys | | | ICAO1 |
| 3 | GSLC | G FOUR S (G4S) INTERNATIONAL LOGIST | | | SCAC4 |
| 4 | GSLD | GESTION LALONDE 1976 INC | | | SCAC4 |
| 5 | GSLG | GST LOGISTICS INC | | | SCAC4 |
| 6 | GSLI | G S LINER | | | SCAC4 |
| 7 | GSLK | GREENSCAPE DESIGN AND DECOR INC | | | SCAC4 |
| 8 | GSLL | GESELL, DONALD INC | | | SCAC4 |
| 9 | GSLM | GRAEBEL ST LOUIS MOVERS INC | | | SCAC4 |
| 10 | GSLN | GESTION ST-LOUIS ENRG | | | SCAC4 |
| 11 | GSLP | GIBSON L P TRANSPORT INC | | | SCAC4 |
| 12 | GSLT | GOSAL TRANSPORT INC | | | SCAC4 |
| 13 | GSLU | GOLD STAR LINE LTD | | HK | BIC |
| 14 | GSLU | GOLD STAR LINE LTD | | | SCAC4 |
| 15 | GSLV | GOLDEN STANDARD LOGISTICS LLC | | | SCAC4 |
| 16 | GSLW | G & S LOGISTICS | | | SCAC4 |
| 17 | GSLX | Silcott Railway Equipment | added 10/2003; eliminated 7/2004; 7/2005 (not listed) | | NAKINA |
| 18 | GSLX | Godehaux Sugars, Inc. | 7/1935 | | NAKINA |
| 19 | GSLX | SILCOTT RAILWAY EQUIPMENT | | | PWRC |
| 20 | GSLX | George R Silcott Railway Equipment | | | RSRV |
| 21 | GSLX | SILCOTT RAILWAY EQUIPMENT LTD | | | SCAC4 |
| 22 | GSLY | GLOBAL STAR LINES LIMITED | | | SCAC4 |
