Thank you BigMurph26 for making these gifs.
Stashed in: Best of GoT, High Quality gifs, BigMurph26, Best Game of Thrones gifs
BigMurph26 made an album of 15 great ones: http://imgur.com/a/EgCOa
Spoiler alert so don't click through if you haven't watched.
Will add my favorites below.
More cheers gifs: http://pandawhale.com/post/18170/leonardo-dicaprio-raising-glass-cheers-gif
Tyrion Lannister cheers gif: http://pandawhale.com/post/36434/tyrion-lannister-cheers-drinking-gif