| Rank | Abbreviation | Meaning |
|---|
| ***** | GMCA | Global Migrants for Climate Action
| |
| ***** | GMCA | General Military Course Advisor
| |
| ***** | GMCA | Gun Mage Captain Adept
| |
| ***** | GMCA | Georgia Medical Center Authority
| |
| ***** | GMCA | Galt Mile Community Association
| |
| **** | GMCA | Global Marine Climatic Atlas
| |
| **** | GMCA | Georgia Mountains Christian Academy
| |
| **** | GMCA | Gore Microwave Cable Assembly
| |
| **** | GMCA | GULF MEDICAL COLLEGE AJMAN
| |
| *** | GMCA | Greater Manchester Combined Authority
| |
| *** | GMCA | Georgia Mosquito Control Association
| |
| *** | GMCA | Global Marketing Communication & Advertising
| |
| *** | GMCA | GENERAL MINERALS CORP.
| |
| *** | GMCA | Graduate Management Consulting Association
| |
| *** | GMCA | greater metropolitan challenge association
| |
| ** | GMCA | Green Mountain Christian Academy (Denver, CO)
| |
| * | GMCA | Gerber Miller Chartered Accounta
| |
| * | GMCA | Giant Mine Community Alliance
| |
| * | GMCA | Georgia Municipal Cemetery Association
| |
| * | GMCA | Green Mountain Common Allotment
| |
| * | GMCA | Global Mobile Content Awards
| |
| * | GMCA | Green Mountainside Civic Association
| |
| * | GMCA | Grabowski Mavins Chartered Accountants
| |