Thanks to Avuton, there is now a working windows 32 build of GMPC 11.8.

You can download it here:

Portable app: http://download.sarine.nl/Programs/gmpc/11.8.16/GmpcPortable_11.8.16_English.paf.exe

Installer: http://download.sarine.nl/Programs/gmpc/11.8.16/gmpc-11.8.16-win32.exe

Files: http://download.sarine.nl/Programs/gmpc/11.8.16/gmpc-11.8.16-win32.7z

Again, big thanks to avuton for building these.