| Acronym | Meaning |
 | GM | Gaseous Mixture |
| GM | Geometric Mean |
| GMAL | General Electric Macro Assembly Language |
| GMBL | Gimbal |
| GMCL | Ground Measurements Command List |
| GMIL | SpGMILSpaceffight Tracking And Data Network (STDN) |
| GML | GeGMLGeneral Measurement Loop |
| GMMC | GrGMMCGround Master Measurements List |
| GMN | GoGMNGorman (TACAN Station) |
| GMT | GrGMTGreenwich MeanTime |
| GMT | Greenwich Mean Time |
| GN | GaGN Gain |
| GN&C | GuGN&CGuidance |
| GN&C | Guidance |
| GN2 | GaGN2Gaseous Nitrogen |
| GN2 | Gaseous Nitrogen |
| GNC | GuGNCGuidance And Navigation COmPuter |
| GNCFTS | GNGNCFTSGN&C Flight Test Station |
| GNCIS | GNGNCISGN&C Integration Simulator |
| GNCS | GuGNCSGuidance And Navi-oation Control System |
| GNCTS | GNGNCTSGN&C Test Station |
| GND | GrGNDGround |
| GND | C/0 GrGND C/0 Ground Checkout |
| GNP | GrGNPGross National Product |
| GO | GeGO General Order |
| GO2 | Gaseous Oxygen |
| GOAL | GrGOALGround Operations Aerospace Language |
| GOC | GrGOCGround Operations Coordinator |
| GOCA | GrGOCAGround Operations Control Area |
| GOE | GrGOEGround Operating EquiPMent |
| GOES | GeGOESGeostationary Operational Environment Satellite |
| GOM | KSGOMKSC Ground Operations Manager At DFRC Or WSMR |
| GOMMS | GrGOMMSGround Operations And Material Management System |
| GOMS | GrGOMSGround Operations Management System |
| GOP | GrGOPGround Operations Panel |
| GOPG | GrGOPGGround Operations Planning Group |
| GOR | GrGORGround Operations Review |
| GORP | GrGORPGround Operations Requirements Plan |
| GORS | GrGORSGround Observer RF System |
| GOSS | GrGOSSGround Operations Support System |
| GOWG | GrGOWGGround Operations Working Group |
| GOX | GaGOXGaseous Oxygen (GO |
| GP | GeGP General Publication (RSC) |
| GP | General Purpose |
| GP | Group |
| GPA | General Purpose Amplifier |
| GPAS | General PurPose Airborne Simulator |
| GPBIM | General Purpose Buffer Interface Module |
| GPC | Gel Permeation Chromatograph |
| GPC | General Purpose Computer |
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