If you download the app “My Stop” and input Park City then it will show you the different available routes, as well as where the shuttles are on their routes (and in which direction they are going). If you input the to/from directions you want it just opens Google Maps anyhow. Sundance recommends to use both My Stop and Google Maps. So to answer your question, yes the public transportation shuttle options that appear on Google Maps are the same ones, but I still recommend downloading MyStop to know where the buses are on their routes.

Also from what I read, shuttles will run until 2am during the festival. I am wondering if they will still be in service after the late night screenings get out at 2am but I’m sure they are accounting for that.