Although unconfirmed by creators, the website has sparked rumors about the show's return. Called 'This is not a website,' it was found in a book about Bill Cipher, written by creator Alex Hirsch.

Gravity Falls’ big villain, Bill Cipher, is getting his own book written by series creator, Alex Hirsch. And it’s for older readers! Out in July.

But Bill Cipher, the inter-dimensional demon bent on taking over the multiverse, is back in action — or at least, he’s back in a new book penned by Gravity Falls creator, Alex Hirsch.