| Rank | Abbreviation | Meaning |
|---|
| ***** | GMBC | Gateshead Metropolitan Borough Council
| |
| ***** | GMBC | General Mimo Broadcast Channel
| |
| ***** | GMBC | Greater Macedonia Baptist Church
| |
| ***** | GMBC | Green Mountain Bicycle Club
| |
| ***** | GMBC | General Missionary Baptist Convention
| |
| ***** | GMBC | Giving My Best Community
| |
| ***** | GMBC | Gods Must Be Crazy
| |
| **** | GMBC | Grace Missionary Baptist Church
| |
| **** | GMBC | Geelong Mountain Bike Club
| |
| **** | GMBC | Glasgow Mountain Bike Club
| |
| **** | GMBC | Gypsy Moth Biological Control
| |
| **** | GMBC | Grizedale Mountain Bike Challenge
| |
| **** | GMBC | Glen Meadows Baptist Church
| |
| *** | GMBC | Good Morning Bleeding City
| |
| *** | GMBC | Granite Mountain Baptist Church
| |
| *** | GMBC | Gethsemane Missionary Baptist Church
| |
| *** | GMBC | Greater Milwaukee Brittany Club
| |
| *** | GMBC | Grant Memorial Baptist Church
| |