GTR
- BMW M3 GTR
- Ford Mustang GT-R
- GT (disambiguation)
- GTR (album)
- GTR (band)
- GTR Euroseries
- GTR Evolution
- GTR – FIA GT Racing Game
- GTR-18 Smokey Sam
- Gareth Emery
- Gateway to Research
- General relativity
- Generalised time reversible
- Golden Triangle Regional Airport
- Govia Thameslink Railway
- Gran Turismo (racing)
- Grand Trunk Railway
- Great River Railroad
- Green tree reservoir
- Guided tissue regeneration
- Holden Torana GTR
- Isuzu Bellett GT-R
- Mad Catz
- Mazda Familia
- McLaren F1 GTR
- McLaren P1 GTR
- McLaren Senna GTR
- Mercedes-AMG GT R
- Mercedes-Benz CLK GTR
- Nissan GT-R
- Nissan Skyline GT-R
- Porsche 718 GTR Coupe
- Porsche 924 Carrera GTR
- Toyota Celica 2000 GTR
- Ultima GTR