Where's my GIF animation?
The GIF feature can be used with most email programs which support HTML formatting of signatures.
If you're not seeing your animations - or any of your other signature formatting - it's possible your emails are currently set to be composed in Plain Text, as opposed to the Rich Text formatting needed. You can check out this guide for more about Plain Text vs Rich Text.
If you're seeing the rest of your signature formatting, but not your GIF animation, send an email to firstname.lastname@example.org indicating which mail program you're using.