Board Thread:General Discussion/@comment-14930191-20130809141441/@comment-3290441-20140804112715

In any case, we know that the government is at least partially involved in Gravity falls thanks to the whole mess with Quentin Trembly, they probably kept a close eye on it to see if any evidence of him ever showed up and could have stumbled upon one or two supernatural phenomenon.

That said I don't see any evidence of wide scale government occupation.