| Acronym | Definition |
|---|
| GCM | General Circulation Model |
| GCM | Galois/Counter Mode (cryptography) |
| GCM | Global Climate Model |
| GCM | Geriatric Care Managers |
| GCM | Global Circulation Model |
| GCM | General Court-Martial |
| GCM | Global Campaign for Microbicides (disease prevention) |
| GCM | Good Conduct Medal |
| GCM | Gross Combination Mass |
| GCM | Graphic Communications Management |
| GCM | General Counsel Memorandum (IRS) |
| GCM | Great Commission Ministries (international church and missions organization) |
| GCM | Greenwich Capital Markets |
| GCM | Greatest Common Measure |
| Gcm | Greatest Common Multiple |
| GCM | Ghana Chamber of Mines (Accra, Ghana) |
| GCM | Government Created Money |
| GCM | Geodesic Constant Method |
| GCM | Ground Control Message |
| GCM | Graph Computation Models (workshop) |
| GCM | Gun Control Module |
| GCM | General Control Module |
| GCM | Gulf Coast Marine |
| GCM | Golay Coding Modulation |
| GCM | Grand Cross of the Most Illustrious Order of Merit (Antigua and Barbuda) |
| GCM | General Clutter Model (radar) |
| GCM | Chief Counsel's Memorandum (IRB) |
| GCM | Group Controller Module (DSC) |
| GCM | Guidance and Control Module |
| GCM | General Claims Memo (State Farm Insurance) |
| GCM | General Care Manager |
| GCM | Guard Channel Method |
| GCM | Global Customer Relationship Management |
| GCM | Gwinnett Commercial Maintenance (Atlanta, GA) |
| GCM | Generalized Coupling Model (electromagnetics) |
| GCM | Guest Communication Manager |
| GCM | Government Contract Manager |
| GCM | Gulf Coast Motor Lines, Inc. (Gulf Coast Gray Line) |
| GCM | Good Central Maintained Vision (ophthalmology; used with infants in testing) |
| GCM | Grand Cayman Island, Cayman Islands - Owen Roberts International Airport (Airport Code) |
| GCM | GIG (Global Information Grid) Content Management (DoD Architectural Vision) |
| GCM | Global Change Management, Inc. (Winter Park, FL) |
| GCM | Grand Corps Malade (poet) |
| GCM | Greedy Channel Management |
| GCM | Golf Course Maintenance |