Mar 06, 2020 William Sean McLavel, also known as G.K. Willington Esquire, and William MacMoran is the groundskeeper and janitor of Springfield Elementary School and a minor character in The Simpsons Movie who's originally from Scotland. Willie's job is to supervise the children of the School during recess. Nov 24, 2001 Groundskeeper Willie. Groundskeeper Willie is a character from The Simpsons. Willie is a Scottish immigrant and works as the groundskeeper at Springfield Elementary School. Top Rated Lists for The Simpsons: Road Rage 100 items All the games I have ever played. 100 items Games I have played in my lifetime! 100 items From The Beginning.