| Acronym | Definition |
|---|
| GTR | Guitar |
| GTR | General Technical Report |
| GTR | Guaranteed to Run (computer training) |
| GTR | Gross Total Resection |
| GTR | Global Trade Repository (Depository Trust and Clearing Corporation) |
| GTR | Guided Tissue Regeneration |
| GTR | Ground Tire Rubber (asphalt) |
| GTR | Greater than |
| GTR | Group Trailer |
| GTR | Gt Racing |
| GTR | Grid Technology Repository |
| GTR | Gamertag Radio (gaming community radio show) |
| GTR | General Time-Reversible (DNA sequence evolution model) |
| GTR | General Theory of Relativity (physics) |
| GTR | Grand Trunk Railway |
| GTR | Government Transportation Request |
| GTR | Génie des Télécommunications et Réseaux (French university studies in networks and telecommunications) |
| GTR | Greater Toronto Region (Canada) |
| GTR | Government Technical Representative |
| GTR | Gotta Run |
| GTR | Got That Right |
| GTR | Grand Trunk Road (India) |
| GTR | Green-Tree Retention |
| GTR | Global Talent Resources, Inc (recruiting firm) |
| GTR | Columbus, MS, USA - Golden (Airport Code) |
| GTR | General Tool & Repair (York, PA) |
| GTR | General Tilt Roller (packaging) |
| GTR | Government Travel Request |
| GTR | Grand Turismo Racing |
| GTR | General Technical Requirements |
| GTR | Groove Train Riders (band) |
| GTR | Gay Teen Resources (online gay teen support group) |
| GTR | Ground Test Reactor |
| GTR | Garantie Temps Rétablissement (French) |
| GTR | Grand Touring Rally |
| GTR | Government Travel Rate |
| GTR | Games to Rent |
| GTR | Generic Tilt-Rotor |
| GTR | GPS Tactical Receiver |
| GTR | Government Travel Regulation |
| GTR | Guaranteed Throughput Router |
| GTR | GPS Timing Receiver (Sprint) |
| GTR | Ground Transportation Request |