| Rank | Abbreviation | Meaning |
|---|
| ***** | GCAA | Gilmer County Athletic Association
| |
| ***** | GCAA | Georgia Christian Athletic Association
| |
| ***** | GCAA | Georgetown College Alumni Association
| |
| ***** | GCAA | Girard College Alumni Association
| |
| ***** | GCAA | Greater Cincinnati Alumnae Association
| |
| ***** | GCAA | General Committee on Academic Affairs
| |
| ***** | GCAA | Global Collegiate Athletics Association
| |
| **** | GCAA | Gauteng Combined Accommodation Association
| |
| **** | GCAA | Gallaudet College Alumni Association
| |
| **** | GCAA | Golden Casket Agents Association
| |
| **** | GCAA | Greater Cleveland Alumni Association
| |
| **** | GCAA | Garden City Athletic Association
| |
| **** | GCAA | Greater China Accountants Alliance
| |
| **** | GCAA | Gates Chili Alumni Association
| |
| **** | GCAA | Galveston County Apartment Association
| |
| **** | GCAA | Ghanaian Canadian Achievement Awards
| |
| **** | GCAA | Graduate Careers Council of Australia
| |
| **** | GCAA | Graduate Committee on Admissions and Awards
| |
| **** | GCAA | Gwasanaethau Cefnogi ac Arolygu Addysg
| |
| **** | GCAA | Galveston College Alumni Association
| |
| *** | GCAA | Guelph Creative Arts Association
| |
| *** | GCAA | Grayville Community Arts Association
| |
| *** | GCAA | Georgian College of Applied Arts
| |
| *** | GCAA | Gilpin County Art Association
| |
| *** | GCAA | Greater Cleveland Auto Auction
| |