2 definitions by caffeine22

acronym used by the military meaning ground assault convoy

(noun) a series of military vehicles lined up to go somewhere for a mission especially overseas.
"hey private you're riding in the gac to baghdad"
by caffeine22 September 19, 2005
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short for operational security. used by military and government personnel.
"dude dont tell your girlfriend when we are deploying thats opsec"
by caffeine22 September 19, 2005
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