| GRT | G R Thangamaligai 
| Others |
| GRT | G Rajendran Thanga
| Others |
| GRT | G. R. Thanga Maligai
| Others |
| GRT | Gamo Replacement Trigger
| Others |
| GRT | Gardenfors Ramsey Test
| Others |
| GRT | Garlock Rubber Technologies
| Others |
| GRT | Gas Return Tube
| Others |
| GRT | Gastric Residence Time
| Others |
| GRT | Gear For Rugged Training
| Others |
| GRT | Gear for Rugged Trekking
| Others |
| GRT | General Recorded Tape
| Others |
| GRT | General Relativity Theory
| Others |
| GRT | General Resource Technology
| Others |
| GRT | General Resource Technology's
| Others |
| GRT | Generic Real Time
| Others |
| GRT | Generic Reporting Tool
| Others |
| GRT | Genotype Resistance Testing
| Others |
| GRT | Genotypic Resistance Testing
| Others |
| GRT | Georgian Railway Telecom
| Others |
| GRT | Gesture Recognition Toolkit
| Others |
| GRT | Giant Retinal Tear
| Others |
| GRT | Global Registration Tool
| Others |
| GRT | Global Relief Technologies
| Others |
| GRT | Global Road Technology
| Others |
| GRT | Global Routing Table
| Others |
| GRT | Go Cart
| Others |
| GRT | Golden Ratio Typography
| Others |
| GRT | Good Real Time
| Others |
| GRT | Graduate Resident Tutor
| Others |
| GRT | Graeme Robertson Trust
| Others |
| GRT | Grand Rapids Technologies
| Others |
| GRT | Grand River Transit
| Others |
| GRT | Granular Recovery Technology
| Others |
| GRT | Grasser Racing Team
| Others |
| GRT | Great Records and Tapes
| Others |
| GRT | Greatest Role for Tasting
| Others |
| GRT | Green Ribbon Trail
| Others |
| GRT | Greg Rudy and Tim
| Others |
| GRT | Grille Retainer
| Others |
| GRT | Grit Recycling Trailer
| Others |
| GRT | Gross Receipt Tax
| Others |
| GRT | Gross Receipts Tax
| Others |
| GRT | Gross Register Tonnage
| Others |
| GRT | Gross Register Tonnes
| Others |
| GRT | Gross Registered Tonnage
| Others |
| GRT | Gross Registered Tons
| Others |
| GRT | Gross Released Tonnage
| Others |
| GRT | Groston
| Others |
| GRT | Group Rapid Transit
| Others |
| GRT | Grove rough terrain
| Others |
| GRT | Guaranteed Rate Transfer
| Others |
| GRT | Gujrat, Pakistan
| Others |
| GRT | Gumbo Racing Team
| Others |
| GRT | Gunn Robotics Team
| Others |
| GRT | Gypsey Roma Traveller
| Others |
| GRT | Gypsy Roma and Traveller
| Others |
| GRT | Gypsy Roma Traveller
| Others |
| GRT | Gypsy Romani and Traveller
| Others |
| GRT | Gypsy, Roma and Traveller
| Others |
| GRT | Rubber Technologies
| Others |