I just made a test build of Geany Plugins 1.22 for Windows.
A little surprisingly for me, it all worked fine on the first attempt :).
I only had problems loading the Geany-Lua plugin with some strange error message which I didn't investigate yet: http://pastebin.geany.org/EUmwJ/ The error message occurs on plugin loading. I'm not sure whether it is caused by my system or something else.
If anyone wants to test it, any feedback is appreciated.
The installer... http://www.uvena.de/tmp/geany-plugins-1.22_setup_testbuild.exe
... requires an existing Geany 1.22 installation.