GAR – Grand Army of the Republic
GAOTU – Great Architect of the Universe (Freemason Word)
gc – granted certificate (Quaker)
gct – granted certificate to (Quaker)
GCVO – Grand Cross of the (Royal) Victorian Order (knight)
GD – granddaughter
Gedcom – GEnealogical Data COMmunication, method of transferring genealogy files from one program to another
gl – granted letter
glt – granted letter to
govt. – government
gr dau. – granddaughter
gr s. – grandson
Gr.Yd. – grave yard
GS – grandson
GSSR – General Society, Sons of the Revolution
g.s.w. – gun shot wound