Gaspirator - Later model of gas respirator.
Gearsman - Operator of gearshift in early tanks.
Geese - Portuguese soldiers.
GHQ - General Headquarters.
Glasshouse - Military prison; after glass roofed structure of Shepton Mallet Military Prison in UK.
GOC - General Officer Commanding.
Gor Blimey - Cloth, khaki Field Service Cap with the cap rim stiffening- wire illegally removed to give a crushed casual look affected by old, and not so old, soldiers.
Gotha - Any large German bomber aircraft.
Green Cross - German toxic gas: chloropicrin - lung irritant type.
Green Cross III - German toxic gas: ethyldichloroarsine - sternutator (sneezing and vomiting) type. Shells marked with green crosses.
Greyback - British Army shirt.
GSO - General Staff Officer: GSO1 etc.
Gunfire - Early morning tea.
