This definition appears very rarely
Gen - GeneralGenlt - Generalleutnant - Lieutenant General - Ger. GenMaj - Generalmajor - Major General - Ger. GEP - General Equipment Park GES - Glider Exercise SquadronGEU - Glider Exercise Unit GFM - Generalfeldmarschall - Field Marshall - Ger. GG - Ground Gunnery GGS - Ground Gunnery School GI - Ground Instructional GIC - Gliding Induction Course (Air Cadets) GIF - Glider Instructors FlightGIP - Grid Intersecting PointGIS - Glider Instructors School GL - Gun Laying (radar)GMC - General Military CourseGnd - ground Gnr - Gunner (private in artillery)(G) OTU - Glider Operational Training UnitGoC - Government of CanadaGOC - General Officer Commanding Gp - Group GP - General Purpose GP CF - Group Conversion Flight GP/DA - Group Disposal Account (book-keeping exercise for damaged aircraft)GPEU - Glider Pilot Exercise Unit GPIS - Glider Pilot Instructors School GPMG – General Purpose Machine GunGPO - Gun Position OfficerGPS – Global Positioning SystemGPUTF - Glider Pick-up Training Unit GPR - Glider Pilot RegimentGQA - Government Quality AssuranceGR - General reconnaissance GR&ANS - General Reconnaissance and Air Navigation School GRF - Ground Radar Fitter GRICS - Ground Radio Installation Clearance Service (security clearance for visitors) Gröfaz - Der größte Generall und Feldherr aller Zeiten - The greatest General and Field Commander of all time - Sly nickname for Hitler - Ger. GRS - General Reconnaissance SchoolGRSF - Ground Radio Servicing FlightGRSS - Ground Radio Servicing Squadron.