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G/A ground/air or ground-to-air
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G/G ground/ground
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G/S glide slope
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GA general aviation
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GA go-around
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GAAS gallium arsenide
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GACS genetic ATN communications service
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GAGAN geostationary augmentation network
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GAIN galley inserts
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GAIT ground-based augmentation and integrity technique
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GAMA General Aviation Manufacturers Association
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GAN global area network
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GAO Government Accountability Office (U.S.)
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GATM global air traffic management
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GAViS general aviation vision system
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GBAS ground-based augmentation system
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GBST ground based software tool
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GBT ground-based transceiver
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Gbyte gigabyte (billion bytes)
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GCA ground-controlled approach
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GCAS ground collision avoidance system
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GCB generator circuit breaker
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GCC ground cluster controller (ACARS)
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GCP glare-shield control panel
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GCS ground clutter suppression
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GCU generator control unit
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GDLP ground data link processor
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GDOP geometric dilution of precision
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GDP ground delay program
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GENOT general notice
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GEO geosynchronous/geostationary earth orbit
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GEP ground entry point
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GES ground earth station
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GFE government furnished equipment
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GFI general format identifier
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GFLOPS gigaflops
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GFSK Gaussian frequency shift keying
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GG graphics generator
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GGR G/G router
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GGS GPS ground station
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GGTFM ground-ground traffic flow management
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GH ground handling
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GHz gigahertz
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GI group identifier
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GIB GNSS integrity broadcast
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GIC GNSS integrity channel
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GIC GPS integrity channel
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GIG Global Information Grid
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GIG-BE GIG-Band Expansion
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GICB ground-initiated comm-B
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GIHO ground initiated handoff
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GINS GPS-inertial navigation systems
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GIOVE-A Galileo In-Orbit Validation Experiment-A
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GIP government-industry partnership
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GIS geodetic information system
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GIS graphical information system
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GIVE grid inospheric vertical error
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GJU Galileo joint undertaking
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GL ground location (ACARS/AFEPS)
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GL group length
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GLC geographic locator codes
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GLNS GPS landing and navigation system
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GLONASS Global Navigation Satellite System (Russia)
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GLS GNSS landing system
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GLS GPS landing system
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GLU GPS landing unit
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GM guidance material
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GMC ground movement control
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GMDS ground mobile data service
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GMR giant magnetoresistive
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GMR Ground Mobile Radio
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GMT Greenwich mean time
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GMTI ground moving target indicator
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GMU GPS monitoring unit
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GNA global network architecture
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GNE gross navigational error
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GNR global navigation receiver
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GNSS global navigation satellite system
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GNSSP GNSS Panel (ICAO)
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GoMATS Gulf of Mexico advanced traffic surveillance
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GOPS giga operations
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GOS grade of service
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GOSIP government open systems interconnection profile
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GP general purpose
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GPADIRS global positioning, air data, inertial reference system
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GPCBT guidelines for the production of computer-based training (Eurocontrol)
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GP&C global positioning and communications
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GPIB general purpose instrument bus
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GPIRS global positioning/inertial reference system
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GPP general purpose processor
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GPPU general-purpose processing unit
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GPRS general packet radio services
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GPS Global Positioning System
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GPSSU GPS sensor unit
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GPU ground power unit
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GPWC ground proximity warning computer
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GPWS ground proximity warning system
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GR ground router
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GRAS ground-based regional augmentation system
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GRIP gridded binary (National Weather Service model output)
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GRP geographic reference point
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GS ground speed/station
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GSC ground station controller (ACARS)
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GSE ground support equipment
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GSIF ground station information frame
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GSM global systems mobile
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GSMS ground station management system
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GSP glare shield panel
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GTC data link ground terminal computer
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GUI graphical user interface
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GVE graphics vector engine
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GW gateway
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GWDS graphic weather display system
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GWS graphical weather services
