GTC
- Bangladesh
- GPU Technology Conference
- Gateway Technical College
- Gauhati Town Club
- GeTai Challenge
- General Teaching Council (disambiguation)
- General Trade Company
- Generalised tonic-clonic seizure
- Generic Token Card
- Genome Therapeutics Corporation
- Girls' Training Corps
- Going to California (TV series)
- Good 'til cancelled
- Government Tolaram College
- Graceful tree conjecture
- Grameen Telecom
- Gran Telescopio Canarias
- Gran Turismo Concept
- Grand Traverse County, Michigan
- Grand Trunk Corporation
- Green Templeton College, Oxford
- Greenville Technical College
- Griffin Technical College
- Ground Training Competition
- Grudge Training Center
- Guild of Television Camera Professionals
- Gwinnett Technical College
- Narayanganj
- Opel GTC
- Sasol GTC Championship