you can try, to keep the orginal size, of your gif. If you change the orginal size, the gif will not animated. You can set the orginal size of your Image-Objekt by marking a Checkbox in Objektmanger, on the right hand. I hope this help's you a little bit.
The easiest solution is not to export the gif when you export your site (or page). The way to do this is to doubleclick your gif and in the new window that opens place a mark in front of the line that states:
"Only Link (no Export)"
which can be found on the General tab beneath the Export Options in this new window.