(Yep, I use that site for all my cartoony goodness too. It's got plenty of shows that don't air down here.)
Gravity Falls is incredible and the fandom is even more so, deciphering clues and hidden meanings and stuff... I don't even know, I just love the show and how creepy it can be. I can't wait for the next season, I didn't even realise I was watching the final at first and flailed at the cliffhanger