GTR

GTR may refer to:

Transportation

 * Great River Railroad, in Mississippi, US
 * Grand Trunk Railway, a defunct North American railway
 * Golden Triangle Regional Airport (IATA and FAA LID codes), serving Columbus, Mississippi, US
 * Govia Thameslink Railway, a British railway operator
 * GTR Euroseries, a short-lived European auto racing series
 * Global Technical Regulations, a 1998 multinational agreement regarding vehicle regulations

Automobiles

 * Gran Turismo (racing), a type of sports car
 * BMW M3 GTR
 * Holden Torana GTR
 * Isuzu Bellett GT-R
 * Mazda Familia GT-R
 * McLaren F1 GTR
 * McLaren P1 GTR
 * Mercedes-AMG GT R
 * Mercedes-Benz CLK GTR
 * Nissan Skyline GT-R
 * Nissan GT-R
 * Porsche 924 Carrera GTR
 * Toyota Celica 2000 GTR
 * Ultima GTR
 * Ford Mustang GT-R concept car

Science and medicine

 * General theory of relativity, also known as General relativity, in physics
 * Generalised time reversible, in biology
 * Guided tissue regeneration, in dentistry

Video games

 * GTR – FIA GT Racing Game, a video game
 * GTR Evolution, a video game
 * GTR Group, owner of the defunct video game company Mad Catz

Other uses

 * GTR (band), a British rock band
 * GTR (album), their sole official studio album
 * Gateway to Research (Gtr), UK research information portal
 * GTR-18 Smokey Sam, an American SAM training rocket
 * Green tree reservoir, flooded forest land