| Comics Guarantee Corporation | Business |
| Comics Guaranty Corporation | Business |
| Credit Guarantee Corporation | Business |
| Certified Guaranty Company | Business |
| Capital Gold Corporation | Business |
| Center for Guardianship Certification | Business |
| Certified Genetic Counselor | Business |
| Certified General Contractor | Business |
| Chenega Government Consulting | Business |
| Certified Guarantee Company | Business |
| certification and grading Comic | Business |
| Canopy Growth Corp | Business |
| Consumer Generated Content | Business |
| Canopy Growth Corporation | Business |
| Cascade Natural Gas Corporation | Business |
| Captains Girls Club | Community |
| Crazy Girls Club | Community |
| Community Garden Connections | Community |
| Competitive Gaming Conference | Community |
| Cleaner Greener Communities | Community |
| Child Guidance Council | Community |
| Computer Gamers Collective | Computing |
| Cyber Grand Challenge | Computing |
| Chipset Graphics Controller | Computing |
| Computer Graphics Conferences | Computing |
| Computer Generated Cardboard | Computing |
| Computer Generated Character | Computing |
| Computer Generated Citation | Computing |
| Computer Generated Content | Computing |
| Computer Generated Constant | Computing |
| Computer Generated Code | Computing |
| Compressed Gas Cylinder | General |
| Caenorhabditis Genetics Center | General |
| Character Generation Character | General |
| Canine Good Citizenship | General |
| Canine Good Citizen Certificate | General |
| Conspicuous Gallantry Cross (UK military) | General |
| Corporate Giving Connection | General |
| Common Gamma Chain | General |
| Center for Global Change | General |
| Coast Guard Command | General |
| Clean Green Cars | General |
| Cadastro Geral de Contribuinte | General |
| Classic Gas Coupe | General |
| Car Girl Culture | General |
| Car Guy Chronicles | General |
| Canberra Gemini Club | General |
| Cainine Good Citizen | General |
| Centre for Global Competency | General |
| Color Glass Condensate | General |
| Couture goes Corporate | General |
| Canine Good Citizens | General |
| Center For Gravitation And Cosmology | General |
| Canine Good Citizen | General |
| Coast Guard Cutter | Governmental |
| Command Guidance Computer | Governmental |
| Conspicuous Gallantry Cross | Governmental |
| Chief Gun Captain | Governmental |
| συβουλευτική επιτροπή διαχείρισης και συντονισού | International |
| Conseil Gabonais des Chargeurs | International |
| Confederación General de Cuadros | International |
| Canine Good Certificate | Medical |
| Cracking the Genetic Code | Medical |
| Cancer Genomics Consortium | Medical |
| Cancer Genomics Cloud | Medical |
| Commonwealth Grants Commission | Regional |
| Canadian Grain Commission | Regional |
| Cape Gloucester, Papua New Guinea | Regional |
| Cranbury Golf Club | Sports |
| California Gun Club | Sports |