| Rank | Abbreviation | Meaning |
|---|
| ***** | GRSC | Galvanized Rigid Steel Conduit
| |
| *** | GRSC | Graduate of the Royal Society of Chemistry
| |
| *** | GRSC | Graduateship of the Royal Society of Chemistry
| |
| *** | GRSC | Ghan Ruth Singh Company
| |
| *** | GRSC | GABAA (Gamma-Amino Butyric Acid-A) Receptor Supramolecular Complex
| |
| *** | GRSC | Grievance Redress and Settlement Committee
| |
| ** | GRSC | Grand River Sailing Club
| |
| ** | GRSC | Graduate of the Royal School of Chemistry
| |
| ** | GRSC | Glen Rock Soccer Club
| |
| ** | GRSC | Gravel, Silt and Clay
| |
| * | GRSC | Global Resource Systems Corporation
| |
| * | GRSC | Grant and Research Services Center
| |
| * | GRSC | GENERAL RESOURCES CORP.
| |
| * | GRSC | Golden Rainbow Senior Center
| |
| * | GRSC | Grass Roots South Carolina
| |
| * | GRSC | Global Radio Standards Collaboration
| |
| * | GRSC | Glasgow Rangers Supporters Club
| |
| * | GRSC | Green River Saddle Club
| |
| * | GRSC | Global Recruitment Solutions Canada
| |
| * | GRSC | Granite Reef Senior Center
| |
| * | GRSC | Global Radio Standardization Collaboration
| |
| * | GRSC | Glaucoma Research Society of Canada
| |
| * | GRSC | Global Radiocommunication Standardization Collaboration
| |
| * | GRSC | Graduate Research Scholarships Committee
| |
| * | GRSC | Global Renewals Service Centre
| |