You do realize that this thread is a different topic and more than three years old, yes?
LOL You might want to post a question in Forum Assistance. We do have people (one person, really) using animated .gif files for their emoticons. So, they might be able to help you out.
I do not believe .gif files as an avatar will work, though the software might actually allow it. I've just never checked. If it would work with what we've got, we could discuss that possibility. However, a lot of old, stodgey users don't want animated anything unless the specifically allow it - and we have myriad old and stodgey people. There could be some pushback on the subject.