hi, has anyone played .wmv files in puredata / gem ? or other graphic addons for puredata?

Depends on the OS. The flip4mac component for Quicktime on OSX should work. They won't play on the Windows version at all. Linux might be able to play some of them with ffmpeg.

WMV (and the MPEGs) is not really useful beyond datarate limited end consumer delivery. GEM does not fall into that category.