Supposedly there are about 6 wild grouse in the Cohutta wildlife area (part of the Chattahoochee national forest).

I am in the same boat. Shoot clays regularly in Atlanta, but can't seem to find any suitable hunting opportunities in reasonable proximity (for a novice such as myself). A buddy and I went to a "plantation" in South Georgia and gunned down a few pen-raised birds. Didn't feel very sporting and haven't done it since.