If you want to build Gtk2, you need to install the Gtk+ binaries - see, eg
http://www.gtk.org/download-windows.html.
Make sure you include the pkg-config binary, as it's needed to build ExtUtils-PkgConfig. The failure to build ExtUtils-PkgConfig is the first thing that's killing your attempt, afaict ... once you've got that out of the way you can start working through the other problems that arise on Windows.
Not sure if you have the ppm utility, nor could I see what version of perl you're running, but there are ppm packages for Gtk2 for perl's 5.8, 5.10, 5.12 and 64-bit 5.12 available
here. (I see other links in this thread suggesting they might be available elsewhere, too.) I should have ppm packages there for both 32-bit and 64-bit perl-5.14 by about this time next week.
Cheers,
Rob