G.18 ~ Gunner 18-pdr Quick Firing Gun

G.4.5" ~ Gunner 4.5" Quick Firing Howitzer

G.60 ~ Gunner 60pdr Breech Loading Gun

G ~ General Staff Branch

G ~ Groom

GAA ~ Gunner Anti-Aircraft

GAF ~ Gun Ammunition Filling (Department)

GBE ~ Knight (or Dame) Grand Cross of the Order of the British Empire

GC ~ General Captain

GCB ~ Knight Grand Cross of the Order of Bath

GCIE ~ Knight Grand Cross of the Order of the Indian Empire

GCM ~ General Court Martial

GCMG ~ Knight Grand Cross of the Order of St Michael & St George

GCSI ~ Knight Grand Cross of the Order of the Star of India

GCVO ~ Knight Grand Cross of the Royal Victorian Order

Gd ~ Guard

GDAC ~ Guards Division Ammunition Column

GDO ~ General Duty Orderly (medical)

GER ~ Great Eastern Railway

GF ~ Gauge Factory (Ministry of Munitions)

GG ~ Gardner-Gatling (munitions)

GG ~ Grenadier Guards

GGC ~ Gun Group Commander

GHQ ~ General Headquarters

GHQTSC ~ General Headquarters Troop Supply Column

GLI ~ Gloucestershire Light Infantry

GMP ~ Garrison Military Police

Gnr ~ Gunner

GNR ~ Great Northern Railway

GOC ~ General Officer Commanding

GOC-in-C ~ General Officer Commanding-in-Chief

GOCRA ~ General Officer Commanding Royal Engineers

GPO ~ General Post Office

Gr ~ Gunner

GRC ~ Graves Registration Commission

GRH ~ Gunner Royal Horse Artillery

GRM ~ Government Rolling Mill

GRO ~ General Routine Order

GRU ~ Graves Registration Unit

GS ~ General Staff

GS ~ General Service

GSGS ~ Geographical Section of the General Staff (War Office)

GSO ~ General Staff Officer

GSW ~ Gun Shot Wound