Basic indesign animation export to gif

I've created a very basic animation in indesign using the Window/Interactive/Animation function. I've been asked to supply this as a gif file and I can't find a way to do it. I don't have the time (or skills) to redraw this in Photoshop. Is there a way I can save my animation as a gif file simply and easily? I have a published online link.

Thanks in advance.