Is it possible to import a animated GIF into QGIS? And is it also possible to georeference it, to have it on the right place?
Yes. If you load a gif into QGIS as a raster you can use a World File to locate it geographically.
Since its world unicorn day, here's a Unicorn GIF loaded into QGIS:
note that it will not animate. The image is loaded as a raster with 80 bands. I think each band is a frame of animation but you'd have to play with it to make it animate. What I've shown is a single band rendered as gray-scale.