What does "G. I." mean?

galvanized iron

The term G.I. has been used as an initialism of "Government Issue", "General Issue", or "Ground Infantry", but it originally referred to "galvanized iron", as used by the logistics services of the United States Armed Forces.

Explanation:

The term G.I. has been used as an initialism of "Government Issue", "General Issue", or "Ground Infantry", but it originally referred to "galvanized iron", as used by the logistics services of the United States Armed Forces.

it's lower nubia : ) good luck

ba geologist finds four sedimentary rock she determines that no geologic events have shifted the layers she labeles them a,b,c,dbfrom top to bottom