You can't cast GIFs from the Android app.
However, you can display it by inserting the URL of the GIF image.
By the way, Farcaster itself stores GIFs on Cloudflare, but if you register and post them yourself, you will have to pay for it.
So I recommend gyazo.
https://gyazo.com/
Image files are also permanently stored and can be used for free.
I made a video to make it easier to understand, so please take a look.
As you can see in the video, all you have to do is add ".gif" to the end of the URL of the GIF image you posted to gyazo and cast it.

Hey Master 
having trouble uploading GIFs on Android devices. They keep uploading as static images.
any idea ?

I'm Japanese Graphic designer. I use translations to cast, so sorry if I use strange English. /likewen

I hope this helps you. @0xlizard 
https://warpcast.com/0xlizard/0x0c557a79

Oh! I didn't know that!
Thank you for letting me know!
🍖 x 150

Thanks 🍖x100
I already have a desktop-mode tab in my browser open and I cast GIFs with  it