| GTN | Gainesville Television Network 
| Others |
| GTN | Galactic trade network
| Others |
| GTN | Galaxy Training Network
| Others |
| GTN | Gamertag Nation
| Others |
| GTN | Garmin Touchscreen Navigator
| Others |
| GTN | Gas Transmission Northwest
| Others |
| GTN | Gay Torrent News
| Others |
| GTN | Generative Teaching Networks
| Others |
| GTN | Genetic Testing Network
| Others |
| GTN | Gestational Trophoblastic Neoplasia
| Others |
| GTN | Ghosttales Television Network
| Others |
| GTN | Gifted Travel Network
| Others |
| GTN | Glentan, Mount Cook, New Zealand
| Others |
| GTN | Glioblastoma Therapeutics Network
| Others |
| GTN | Global Talent Network
| Others |
| GTN | Global Tax Network
| Others |
| GTN | Global Taxi Network
| Others |
| GTN | Global Technology Network
| Others |
| GTN | Global Transportation Network
| Others |
| GTN | Global Trends Network
| Others |
| GTN | Global Triathlon Network
| Others |
| GTN | Glyceryl TriNitrate
| Others |
| GTN | Goodyear Telephone Network
| Others |
| GTN | Google Toolbar Notifier
| Others |
| GTN | Government Telecommunications Network
| Others |
| GTN | Gran Turismo Nascar
| Others |
| GTN | Gran Turismo Nazionale
| Others |
| GTN | Grand Touring Normal
| Others |
| GTN | Greater Talent Network
| Others |
| GTN | Greensboro Television Network
| Others |
| GTN | Gross To Net
| Others |