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What does the military nickname GI stand for?

Answer:
Government Issue -The nickname "GI'S" refers to the government issue stamp on the soilders uniforms!

Second opinion

Or General Infantry  

Correct Answer

is Government Issue. If it was General Infantry, then artillerymen, airmen, clerks and cooks wouldn't be GIs. When you go to boot camp, all your personal items are taken away and everything you have is Government Issue.

 

Actual answer:

Galvanized iron, dating back to WWI. People generally assume it stands for "government issue".
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First answer by Snatchbeast. Last edit by Friendlyheather. Contributor trust: 0 [recommend contributor recommended]. Question popularity: 18 [recommend question].