| GRS | Galaxy Rocket System 
| Others |
| GRS | Galley Refrigeration System
| Others |
| GRS | Galvanized Rigid Steel
| Others |
| GRS | Gamma Ray Source
| Others |
| GRS | Gamma Ray Spectrometer
| Others |
| GRS | Gas Reservoir Suspension
| Others |
| GRS | Gasser Racing Series
| Others |
| GRS | Gazoo Racing Sport
| Others |
| GRS | Gender Reassignment Surgery
| Others |
| GRS | Genealogical Research System
| Others |
| GRS | General Radio Service
| Others |
| GRS | General Records Schedule
| Others |
| GRS | General Records Schedules
| Others |
| GRS | General Religious Support
| Others |
| GRS | General Resource Selector
| Others |
| GRS | Generic Record Syntax
| Others |
| GRS | Genesis Rehab Services
| Others |
| GRS | Geo redundant storage
| Others |
| GRS | Geographic Response Strategies
| Others |
| GRS | Georgia Reproductive Specialists
| Others |
| GRS | Geosynthetic Reinforced Soil
| Others |
| GRS | Geriatrics Review Syllabus
| Others |
| GRS | German Railway Society
| Others |
| GRS | German Research School
| Others |
| GRS | Gesture Recognition System
| Others |
| GRS | Get Reservation Status
| Others |
| GRS | Getting Rid of Stuff
| Others |
| GRS | Ghetto Recording Studios
| Others |
| GRS | Ginetta Racing Sport
| Others |
| GRS | Global Rating Scale
| Others |
| GRS | Global Recycle Standard
| Others |
| GRS | Global Recycled Standard
| Others |
| GRS | Global Reference Solution
| Others |
| GRS | Global Registry Services
| Others |
| GRS | Global Registry System
| Others |
| GRS | Global Research Services
| Others |
| GRS | Global Resource Serialization
| Others |
| GRS | Global Resource Solutions
| Others |
| GRS | Global Response Services
| Others |
| GRS | Global Response Staff
| Others |
| GRS | Global Retry Schedule
| Others |
| GRS | Global Road Safety
| Others |
| GRS | Global Roaming Server
| Others |
| GRS | Golabi Rosen Syndrome
| Others |
| GRS | Gootman Rosenberg and Sauvageot
| Others |
| GRS | Gordon Research Seminar
| Others |
| GRS | Government Records Service
| Others |
| GRS | Grading and Roster System
| Others |
| GRS | Graduate Research Scholar
| Others |
| GRS | Graduate Research Scholars
| Others |
| GRS | Graduate Research Symposium
| Others |
| GRS | Graph Rewriting System
| Others |
| GRS | Grapple Rotator for Saw
| Others |
| Grs | Grass
| Others |
| GRS | Gravitational Reference Sensor
| Others |
| GRS | Great Red Spot
| Others |
| GRS | Green River Shale
| Others |
| GRS | Greenwich Reform Synagogue
| Others |
| GRS | Grievance Redress Service
| Others |
| GRS | Grim Reaper Scythe
| Others |
| GRS | Grocery Replenishment Specialist
| Others |
| GRS | Group Reset
| Others |
| GRS | Group Retirement Services
| Others |
| GRS | Grupos Rurales de Seguridad
| Others |
| GRS | Guided Roller System
| Others |
| GRS | Guilford Rail System
| Others |
| grs. | grains
| Others |