the GIF must be sized 100 X 100 or smaller! It's very limited and is frustrating when it won't work. So the guide starts now:
Guide to having this upgraded avatar!
So you want a gif as your avatar? Well here's how! First search up your gif, I used google for example, and right click and save your GIF go to http://ezgif.com/resize and resize your gif to 100 X 100 save it to your desktop
go to your MPGH profile settings and click edit avatar, enter the GIF into the website option and test it, is it to big? Then try another GIF.