hi,
i've made a new branch in my repo : https://github.com/avilleret/Gem/tree/windows_stuff
with some changes to build Gem on Windows with pix_share* objects
this has not been widely tested for now, but it works with small images at least
I will test it further more when I will have image and video plugins
non-WIN32 code should be untouched
+ a -- do it yourself http://antoine.villeret.free.fr