It's now on the list. Had a few requests for it, and agreed, it'd be cool. :)
great app man, thanks
Unless you roll your own viewer, many devs suggest using an embedded UIWebView to animate it.
Otherwise it kinda gets treated as pass-through for most of iOS. The Messages app apparently animates them nicely, and for some is a real motivation to include the feature. (So they can send animated GIFs to their friends.)
Glad you like the app! :D