| 
GGG | 
| 
G&C
 | 
Guidance and Control
 | 
| 
GB
 | 
Gigabytes
 | 
| 
GDS
 | 
Ground
 Data System
 | 
| 
GEC
 | 
Geospace Electrodynamic Connections
 | 
| 
GEO
 | 
Geosynchronous
 Earth Orbit | 
| 
GEVS
 | 
General
 Environmental Verification Specification | 
| 
GEVS
 | 
GSFC Environmental Specification
 | 
| 
GHz
 | 
Gigahertz | 
| 
GLAST
 | 
Gamma
 ray Large Area Space Telescope
 | 
| 
GM
 | 
Geospace
 Missions | 
| 
GMDT
 | 
Geospace
 Mission Definition Team | 
| 
GMT
 | 
Greenwich Mean Time | 
| 
GN&C
 | 
Guidance,
 Navigation, and Control | 
| 
GNS
 | 
GPS Navigation Subsystem
 | 
| 
GNU
 | 
GNUs Not Unix
 | 
| 
GOTS
 | 
Government
 Off-the-Shelf | 
| 
GPIB
 | 
General Purpose Interconnect Bus
 | 
| 
GPIO
 | 
General Purpose Input Output
 | 
| 
GPMC
 | 
Governing Program Management Council
 | 
| 
GPS
 | 
Global
 Positioning System
 | 
| 
GRA
 | 
Grating Assembly
 | 
| 
GS
 | 
Ground
 Station
 | 
| 
GSE
 | 
Ground
 Support Equipment
 | 
| 
GSEC
 | 
Ground
 Support Equipment Control
 | 
| 
GSFC
 | 
Goddard Space Flight Center
 
 | 
| 
GSW
 | 
Ground
 Software
 | 
| 
GT
 | 
Guide
 Telescope
 | 
| 
GTA
 | 
GPS Tracking ASIC
 | 
| 
GTO
 | 
Geosyncronous
 Transfer Orbit | 
| 
GUI
 | 
Graphical User Interface
 | 
| 
GUVI
 | 
Global
 Ultra-violet Imager
 | 
 
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