| GCCC | Garden City Community College 
| Others |
| GCCC | Gate City Corvette Club
| Others |
| GCCC | Gay Classic Car Club
| Others |
| GCCC | Gem County Chamber of Commerce
| Others |
| GCCC | General Conference Community Church
| Others |
| GCCC | Genuine Counterfeit Cuban Cigar
| Others |
| GCCC | Georgia Commodity Classification Code
| Others |
| GCCC | Glamorgan Classic Car Club
| Others |
| GCCC | Glass City Corvette Club
| Others |
| GCCC | Global Contingency Construction Contract
| Others |
| GCCC | Gloucester County Chamber of Commerce, New Jersey
| Others |
| GCCC | Gloucester County Community Church
| Others |
| GCCC | Gold Coast Car Club
| Others |
| GCCC | Gold Coast City Council
| Others |
| GCCC | Gold Coast Corvette Club
| Others |
| GCCC | Grace Church Community Center
| Others |
| GCCC | Grand Cities Childrens' Choir
| Others |
| GCCC | Grantham Classic Car Club
| Others |
| GCCC | Gratiot County Chamber of Commerce
| Others |
| GCCC | Great Commission Community Church
| Others |
| GCCC | Greater Canandaigua Civic Center
| Others |
| GCCC | Greater Cincinnati Cardiovascular Consultants
| Others |
| GCCC | Greater Columbia Corvette Club
| Others |
| GCCC | Greater Cornwall Chamber of Commerce
| Others |
| GCCC | Green Car Clean City
| Others |
| GCCC | Greene County Career Center
| Others |
| GCCC | Ground Control Computer Center
| Others |
| GCCC | Gulf Coast Carbon Center
| Others |
| GCCC | Gulf Coast Community Church
| Others |
| GCCC | Gulf Coast Community College
| Others |
| GCCC | Gulf Coast Corvette Club
| Others |