GTS
- Dodge Viper GTS
- Farboud GTS
- Ferrari 330 GTS
- Ferrari 365 GTS
- GTS (company)
- GTS Rail Operations
- GTS/BKN
- Game Technology Solutions
- Game Theory Society
- Gas Turbine Ship
- GeForce2 GTS
- Geelong Transit System
- General Theological Seminary
- Geologic time scale
- Geometric modeling kernel
- Giant tiny sex
- Gilles de la Tourette syndrome
- Global Telecommunications System
- Go to Sleep (wrestling)
- Good Thinking Society
- Grace Theological Seminary
- Gran Turismo Sport
- Grand Touring Supreme
- Great Torrington School
- Green Tobacco Sickness
- Greenwich Time Signal
- HSV GTS
- Holden Monaro GTS
- Lightning GTS
- Porsche 911
- Porsche Boxster and Cayman
- The Granites Airport
- Toyota 86 GTS
- Vespa GTS