| Rank | Abbreviation | Meaning |
|---|
| ***** | GCAA | Government Corporation Athletic Association
| |
| **** | GCAA | Grand Canyon Airport Authority
| |
| **** | GCAA | Gambia Civil Aviation Authority
| |
| **** | GCAA | General Contractors Association of America
| |
| **** | GCAA | Glossary of Computer Abbreviations and Acronyms
| |
| **** | GCAA | Gilmer County Athletic Association
| |
| **** | GCAA | Georgia Christian Athletic Association
| |
| **** | GCAA | Georgetown College Alumni Association
| |
| **** | GCAA | gelatin capsule of Artemisia annua
| |
| **** | GCAA | Global Competence Aptitude Assessment
| |
| **** | GCAA | Girard College Alumni Association
| |
| **** | GCAA | General Civil Aviation Authority's
| |
| **** | GCAA | Greater Cincinnati Alumnae Association
| |
| **** | GCAA | Grand Central Academy of Art
| |
| **** | GCAA | German Canadian Association of Alberta
| |
| **** | GCAA | General Committee on Academic Affairs
| |
| **** | GCAA | general civil aviation administration
| |
| **** | GCAA | Glaucoma Crónico de Ángulo Abierto
| |
| **** | GCAA | Global Collegiate Athletics Association
| |
| **** | GCAA | Golf Coaches Association of America's
| |
| **** | GCAA | Gallaudet College Alumni Association
| |
| **** | GCAA | Golden Casket Agents Association
| |
| **** | GCAA | Gauteng Combined Accommodation Association
| |
| *** | GCAA | Garden City Athletic Association
| |
| *** | GCAA | Greater Cleveland Alumni Association
| |