/r/gifs: .gifs - funny, animated gifs for your viewing pleasure - Funny, animated GIFs: Your favorite computer file type! Officially pronounced with a hard "J" - October 29, 2015 - 17:46
/r/funny: funny - Welcome to r/Funny, Reddit's largest humour depository. - October 29, 2015 - 17:45
/r/gifextra: GIFs with a little extra! - This subreddit is devoted to GIFs that have things added to them, or edited. - October 29, 2014 - 23:04
/r/combinedgifs: gif+gif - A subreddit for gifs put together in a relevant manner. - October 29, 2014 - 22:31