The +7 is probably a stretch, but it's more noteworthy that this is 4 points better for him than the last Q poll of Georgia (end of September)
Georgia was R+7 last year, if you take off 7 points from Joe's 10 point NPV lead, Joe is up 3. That is without Georgia continuing its lightning fast D trend. Georgia is likely to trend D another 2-3 points this year, bring Joe's margin up to 5-6 points.
Well it was D+2 in 2014, clearly Georgia is trending R
Biden should lose Georgia by 7 points
Overall lets not act like Georgia is heavily dependent on the NPV or national environment. It does help here for getting over the top but isn't everything.