No useless talk, let's get into motion.
I needed a Microsoft Windows version of GTK+3 to migrate one of my applications to the Broadway backend (more info soon).
This one comes from the OpenSUSE Factory repository, hosting "a la Linux" packages. Useful... but since I know most people prefer polished installers, here's my work-of-the-day :
* Onlys DLLs and dependencies, for running GTK+ 3 apps :
GTK+-Runtime-3.4.2_(TARNYKO).exe (18,2 Mb)