Is it possible send a gif image correctly without breaking it?
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.