Did you find an answer to your question? It seems that the platform does not accept the .gif format.
Admin support and I figured it out... kinda:
- It works if you use the "traditional" email. The Mosaico version seems to strip the gifs away.
- If I view the resulting email through our standard email reader, it moves. If I view it through outlook, it does not.
Conclusion - Even if you get the gif to upload and go out properly, it doesn't work on all email readers and therefore is not a good solution for your email.