GTN could refer to:
- Gas Transmission Northwest
- Gdańsk Scientific Society (Polish: Gdańskie Towarzystwo Naukowe)
- Gestational trophoblastic neoplasms
- Getronics; Euronext symbol GTN
- Glentanner Aerodrome, New Zealand; IATA airport code GTN
- Global Trance Network
- Glyceryl trinitrate
- Grangetown railway station, Wales; National Rail station code GTN
- Gray Television; NYSE symbol GTN
- GTN Arts & Science College, Dindigul, Tamil Nadu, India
- Guardian Television Network, Columbus, Ohio, United States