Hello. Steps to reproduce:
1) Navigate to group's stream.
2) upload GIF animation to the stream
3) open this GIF in popup window
4) press on "...in Story album" to navigate to Story album
Result: in Story album there is no this GIF
Expected result: GIF should be in story album (with some mark "GIF).

Or may be you can add feature that add default"GIF album" for groups & user for GIFs only?
PS: I didn't test gif upload to user's stream.

Thanks.