| GCM | Galois Counter Mode 
| Others |
| GCM | Galois/Counter Mode
| Others |
| GCM | Game Theory Based Cloud Model
| Others |
| GCM | General Circulation Model
| Others |
| GCM | General Circulation Models
| Others |
| GCM | General Clearing Member
| Others |
| GCM | General Council Memorandum
| Others |
| GCM | General Court Martial
| Military, Crime, Legal |
| GCM | Generic Car Model
| Others |
| GCM | Genetic Critical Mass
| Others |
| GCM | Geometrically Consistent Matches
| Others |
| GCM | George C Marshall
| Others |
| GCM | Geriatric Care Managers
| Others |
| GCM | German Chiller Manufacturer
| Others |
| GCM | Getz Club Malaysia
| Others |
| GCM | Ghisa Corsa Monoposto
| Others |
| GCM | Gilmore Car Museum
| Others |
| GCM | Git Credential Manager
| Others |
| GCM | Glial Cell Missing
| Others |
| GCM | Glial Cells Missing
| Others |
| GCM | Global Call Management
| Others |
| GCM | Global Capital Management
| Others |
| GCM | Global Catalogue of Microorganisms
| Others |
| GCM | Global Circulation Model
| Others |
| GCM | Global Climate Model
| Others |
| GCM | Global Climate Models
| Others |
| GCM | Global Coalition on Migration
| Others |
| GCM | Global Commerce Management
| Others |
| GCM | Global Commodity Manager
| Others |
| GCM | Global Compact for Migration
| Others |
| GCM | Global Compatability Model
| Others |
| GCM | Global Container Manager
| Others |
| GCM | Global Contract Manufacturing
| Others |
| GCM | Global Coordination Mechanism
| Others |
| GCM | Global Customer Management
| Others |
| GCM | Global Information Grid (GIG) Content Management
| Others |
| GCM | Gnome Clipboard Manager
| Others |
| GCM | Golf Course Management
| Others |
| GCM | Google Calendar Map
| Others |
| GCM | Google Checkout Merchant
| Others |
| GCM | Google Cloud Messaging
| Others |
| GCM | Gospel Communities on Mission
| Others |
| GCM | Gospel Community Mission
| Others |
| GCM | Governor Control Module
| Others |
| GCM | Grand C-Max
| Others |
| GCM | Grand Cayman Island, West Indies
| Others |
| GCM | Grand Central Market
| Others |
| GCM | Granite Crystal Metallic
| Others |
| GCM | Great Commission Ministries
| Others |
| GCM | Greatest Common Measure
| Others |
| GCM | Greatest Common Multiple
| Others |
| GCM | Gross Combination Mass
| Others |
| GCM | Gross Combined Mass
| Others |
| GCM | Grosvenor Capital Management
| Others |
| GCM | Ground Continuity Monitoring (electrical connector)
| Others |
| GCM | Ground Control Manual
| Others |
| GCM | Guild of Church Musicians
| Others |
| GCM | Gulf Coast Marker
| Others |