How can আপনি জমা করুন GIFs on fanpop?

That's how gif. Files work
When another user downloads it, it can সরানো in their desktop browsers, অথবা phone gallery in my case

Most sites are set up that way. Otherwise, you'd be spending an ঘন্টা to load one awnser on a question

If আপনি are trying to use a gif as an প্রতীকী অথবা in an answer it won't work. However if আপনি উঠিয়ে রাখুন it to the প্রতিমূর্তি section, it usually works.