Barr only got 0.73% of the vote in Georgia in 2008; unfortunately, I don't see why Goode would do so much better. He gets 3 or 4% when his name is mentioned in the polls, but most people will only think about Obama and Romney when they head into the booth.
Barr did so poorly in Georgia because people remembered him, and their memories of his history in Congress (...) were far from positive.
Given that Goode went down to quite a liberal guy in an R-leaning district in 2008... I don't see why that wouldn't apply to him as well.