Here are the spoilers from EW:
Gilligan will make his acting debut by playing a smooth-talking gold digger who winds up exacerbating a fight between Annie (Alison Brie) and Abed (Danny Pudi). The episode, which is being filmed this week, will likely air in late winter or early spring.
Gilligan joins Breaking Bad alum Jonathan Banks, who will play a criminology professor in 11 episodes.
Check out the full list of guest stars for Community this season:
Walton Goggins, Nathan Fillion, Robert Patrick, Paget Brewster, Kumail Nanjiani, Tim Heidecker, Eric Wareheim, Katie Leclerc, Ben Folds, and Arrested Development creator Mitchell Hurwitz. John Oliver, Rob Corddry, and Brie Larson are among the returning guests.
Bonus spoiler: Episode 1 of Season 5 will be called "Repiloting."
Community returns on January 2.