Oh, y’all store gifs you’ve made or have downloaded on your device and then upload them. That makes more sense.
Discussion
A lot of the times the exact GIF I want to respond with pops to mind, when reading the note. If I have it, I upload it, if I don’t I search for it on Google and find it.
Amethyst users have GIPHY/Tenor support afaik, which works basically similar to emoji search. Dependant on your written keywords you’ll get recommended GIFs. 
Makes sense, I’m not that well versed in gifs so words come to
mind faster than a gif and I can’t be bothered to look for them. I appreciate them and have a good laugh though.