G-Woman, like g-man, is the shortening of 'Government-Woman' it is a word used to describe a special agent of the FBI or other such law enforcement agency.
from x-files
Mulder:How you probably couldn't afford that nice, new suede coat on a G-Woman's salary. (refering to Scully and the small salary she makes as a gov't woman)
by LovelyLivia April 20, 2007
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