sources in Henry County tell TMZ, cops are investigating possible prostitution.
Waka's mom tells us, cops are also looking for evidence of gangs and drugs, though we have not been able to confirm this with law enforcement.
Our law enforcement sources say cops found marijuana and weapons.
According to neighbors, there are still four cop cars parked outside.
We're told Waka (left) is not there -- and his mom tells us, if he doesn't show up soon ... cops will issue an warrant.
Story developing ... Tmz raided rapper Waka Flocka Flame's Georgia this AM -- and Waka's mom tells us, fellow rapper Gucci Mane is in cuffs and prostitution may be involved.
Waka Say's On Twitter : THE FOLKS JUST KICK MY DOOR N GOOD THING I LEFT FOR COURT LOL N THEY FUCK MY WHOLE HOUSE UP TALKING BOUT THEY GOT A TIP ...... HELLO I FUCKING RAP .... NEXT TIME (PO PO) GET A BETTER TIP