This going to be fun, Facebook to keep things exciting will now support GIF. The company confirmed it in the Facebook News Feed. They said that not everyone will see it immediately, they are still rolling it out. Well, it's nothing new on Facebook since they have supported it before but stop supporting GIFs when they realize that it will make the News Feed too cluttered.
So once it's up you can now post GIF links, not GIF uploads. Your GIF links need to have *.gif at the end.