| GT&R | Goodyear Tire and Rubber 
| Others |
| GTR | Game Time Rant
| Others |
| GTR | Gary Thomas Randall
| Others |
| GTR | Gasoline Tax Refund
| Others |
| GTR | Geartronic
| Others |
| GTR | GeCe Tynka and Reuce
| Others |
| GTR | GeCe Tynka Reuce
| Others |
| GTR | General Technical Report
| Others |
| GTR | General Theory of Relativity
| Others |
| GTR | General Tilt Roller
| Others |
| GTR | General Time Reversible
| Others |
| GTR | Generalized Threshold Replenishment
| Others |
| GTR | Genetic Testing Registry
| Others |
| GTR | George The Rabid
| Others |
| GTR | Ginormous Trashy Ricer
| Others |
| GTR | Girls That Ride
| Others |
| GTR | Global Technical Regulation
| Others |
| GTR | Global Technical Regulations
| Others |
| GTR | Global Text Retrieval
| Others |
| GTR | Global Top Round
| Others |
| GTR | Global Trade Repository
| Others |
| GTR | Global Trade Respository
| Others |
| GTR | Global Trade Review
| Others |
| GTR | Going To Remember
| Others |
| GTR | Golden Triangle Refineries
| Others |
| GTR | Golden Triangle Regional
| Others |
| GTR | Golden Triode Reference
| Others |
| GTR | Google Transparency Report
| Others |
| GTR | Got That Right
| Others |
| GTR | Got To Redirect
| Others |
| GTR | Gotta Run
| Others |
| GTR | Government Transportation Request
| Others |
| GTR | Govia Thameslink Railway
| Others |
| GTR | Graffitied Train Really
| Others |
| GTR | Grain Transportation Report
| Others |
| GTR | Gran Tourismo Racing
| Others |
| GTR | Gran Turismo Race
| Others |
| GTR | Gran Turismo Racer
| Others |
| GTR | Gran Turismo Racing
| Others |
| GTR | Gran Turismo Rasing
| Others |
| GTR | Grand Tour Racing
| Others |
| GTR | Grand Tourismo Race
| Others |
| GTR | Great River Railroad (Rosedale-Bolivar County Port Commission)
| Others |
| GTR | Great River Railroad - Rosedale-Bolivar County Port Commission
| Others |
| GTR | Great Tanaka Rensa
| Others |
| GTR | Great Tharnio Rackum
| Others |
| GTR | Greater Tampa REALTORS
| Others |
| GTR | Greater Toronto Region
| Others |
| GTR | Grid Technology Repository
| Others |
| GTR | Grim Town Revolution
| Others |
| GTR | Group Trailer
| Others |
| GTR | Guaranteed to Run
| Others |
| GTR | Guided Tissue Regeneration
| Others |
| GTR | Guitar Technology Resource
| Others |
| GTR | The Greater Than Relation
| Others |