Forest made it through to the next stage with last night's 2-0 win at Weymouth and Gannon, assistant manager to Keith Curle at League Two Chester, said: "Forest are full of history and it's an opportunity for us to upset them.
"It should be an awkward tie for them and the ground should be close to capacity.
"Gary Megson played at Manchester City with Keith and it's possibly the tie of the round. They're probably the biggest team in the bottom two divisions but it'll be a difficult game for them."