The gathering of information, intelligence, rumors, speculation, etc. about a company/person/hot nightspot/spouse suspected of cheating, etc.
Derived from the military designation for Intelligence Corps.
"Gonna go over to our competitors and do a little G-2."
The term is unspoken. Disclosing the real definition of G2 would serve equal punishment as bank fraud, murder, and or date rape. So... We can't really say. However there are 7 major rules of G2. 1st rule, you do not talk about G2. 2nd rule, you do not talk about G2. 3rd rule, always refer to G2 as G2. 4th rule, there is no exception to the 3rd rule. 5th rule, do not disclose info of G2 to anyone. 6th rule, don't tell G2. 7th rule and final rule of G2, elections are held and majority rules on decisions as to who knows about G@. Screening might be necessary.
I see you reading this G2. We're always watching you G2. G2....I see you.