Avionics Magazine presents the third edition of our comprehensive Aerospace Acronym Guide. Since we started compiling the list in 2002, the number of acronyms and abbreviations has grown by 660 entries, from 2,306 to 2,966.
Though it is not an exhaustive list, we trust it will serve you well.
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G/A ground/air or ground-to-air
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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 General Accounting Office
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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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GDAP growing danger of acronym proliferation
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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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G/G ground/ground
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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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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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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 Golf 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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GPPUs general-purpose processing units
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GPRS general packet radio services
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GPS Global Positioning System (Navstar)
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GPS L1 GPS L1 frequency
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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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G/S glide slope
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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
