| Rank | Abbreviation | Meaning |
|---|
| ***** | GCAC | Generic Call Admission Control
| |
| ***** | GCAC | Greater Capital Area Chapter of the American Nurses Association
| |
| ***** | GCAC | Glaucoma Crónico de Ángulo Cerrado
| |
| ***** | GCAC | Generic Connection Admission Control
| |
| ***** | GCAC | Genoa City Athletic Club
| |
| **** | GCAC | Greater Columbus Arts Council
| |
| **** | GCAC | Golf Course Advisory Committee
| |
| **** | GCAC | Government Contracting Assistance Center
| |
| **** | GCAC | Grace Chinese Alliance Church
| |
| **** | GCAC | Garde Côtière Auxiliaire Canadienne
| |
| **** | GCAC | Glacier Country Avalanche Center
| |
| *** | GCAC | Greater Chattanooga Aquatic Club
| |
| *** | GCAC | Global Connection Admission Control
| |
| *** | GCAC | Global Consumer Acquisition Corp
| |
| *** | GCAC | Green Campus Advisory Committee
| |
| ** | GCAC | Greater Cleveland Asthma Coalition
| |
| ** | GCAC | Gulf Coast Athletic Conference
| |
| * | GCAC | Gold Coast Arts Centre
| |
| * | GCAC | Grove City Alliance Church
| |
| * | GCAC | Global Community Assessment Centre
| |
| * | GCAC | Golf Card Archives of Cards
| |
| * | GCAC | Gulf Coast Athletic Club
| |
| * | GCAC | Garde cotiere auxiliaire Canadienne
| |
| * | GCAC | Guadalupe Cultural Arts Center
| |
| * | GCAC | Glacier Country Avalanche Center, Inc.
| |