Well actually: “It was originally an initialism used in U.S. Army paperwork for items made of galvanized iron.[2] The earliest known instance in writing is from either 1906[3] or 1907.[2]”
Also later on re-interpreted as “government issued” etc. but I guess today it just means US army soldier
Well actually: “It was originally an initialism used in U.S. Army paperwork for items made of galvanized iron.[2] The earliest known instance in writing is from either 1906[3] or 1907.[2]” Also later on re-interpreted as “government issued” etc. but I guess today it just means US army soldier