...We don't have gifs??
[Linked Image from media1.tenor.com]


Jokes aside, https://tenor.com/ is the site that Discord uses for its GIF functionality. You can go there and lookup your favorite gifs just like on Discord, right click them, copy image link, and add them as an image like I just did! That's probably the easiest short term solution. It probably wouldn't be unbearably difficult to get it to load in-site via an embed like Discord does. Though you'd need to work with their API and resize the gifs to be moderately small in the popup like Discord does I imagine.

[Linked Image from i.postimg.cc]