Nope. It will lose it's immunity to Ground type moves for that turn. Example turn 1 Skarmory uses Roost then Torterra uses Earthquake. Earthquake will hit for super effective damage because Skarmory lost it's flying type. If you mean dodge by if their evaisiveness is risen or the Ground type move is inaccurate(like mud-bomb) then their is still the same chance as dodging as any other Pokemon in the same situation.
Source: Personal experience and Bulbapedia
