Gtk training from zetcode http://zetcode.com/tutorials/gtktutorial/ and others, with modification for Gtk 3 compatibility
TDM64 bundle with GCC 4.8.1 : http://tdm-gcc.tdragon.net/
gtk+-bundle_3.6.4-20130921_win32.zip : http://win32builder.gnome.org/
Glade : http://ftp.gnome.org/pub/GNOME/binaries/win32/glade/
gcc -m32 -Wall -g -o glade glade.c pkg-config --libs --cflags gtk+-3.0
or,
If using glade for ui designer, compile with this
gcc -m32 -Wall "-Wl,--export-all-symbols" -g -o glade glade.c pkg-config --libs --cflags gtk+-3.0