) ▁- ▁Global ▁Private ▁Tele phone ▁Network . ▁ ▁( Common ly ▁mis ident ified ▁as ▁the ▁General ▁Pur pose ▁Tele phone ▁Network ). ▁Grand ▁S lam ▁- ▁The ▁ 1 0 ▁ton ▁earth qu ake ▁bomb ▁designed ▁by ▁Bar nes ▁Wall is . ▁Gre ml in ▁- ▁A ▁myth ical ▁creature ▁that ▁lived ▁on ▁certain ▁aircraft ▁and ▁caused ▁mechanical ▁fail ures ▁at ▁the ▁most ▁incon ven ient ▁times ▁and ▁then ▁could ▁not ▁be ▁located ▁as ▁the ▁source ▁of ▁the ▁problem . ▁Get ▁the ▁green ▁- ▁An ▁OK ▁for ▁take ▁off ▁sometimes ▁by ▁a ▁green ▁f lare . ▁Green ▁lights ▁on ▁aircraft ▁instruments ▁showed ▁the ▁systems ▁were ▁function ing ▁properly . ▁Gra vy ▁( the ) ▁- ▁The ▁Atlantic . ▁Gre ens ▁Standard ▁work / f lying ▁cl othing ▁now ▁worn ▁by ▁air men . ▁G ri pper ▁- ▁Gr ound ▁Equ ip ment ▁mechan ic ▁or ▁techn ician . ▁Gro cer ▁- ▁Equ ip ments ▁officer . ▁G ron k ▁- ▁Def ec ate ▁ ▁G ron k ▁board ▁- ▁A ▁board ▁where ▁am using ▁rub b ish ▁may ▁be ▁p inned ▁up , ▁like ▁pictures ▁of ▁ugly ▁women . ▁Gr ound ▁Wal lah ▁- ▁An ▁officer ▁who ▁did ▁not ▁fly . ▁Group ie ▁- ▁Group ▁Captain . ▁G row ▁Bag ▁- ▁F lying ▁Su it . ▁From ▁N CO ▁Air cre w ▁who ▁join ▁up ▁and ▁are ▁promoted ▁to ▁ser ge ant ▁on ▁completion ▁of ▁training . ▁Take ▁a ▁flying ▁suit , ▁fill ▁with ▁tra ine e , ▁add ▁water ▁=