The Gtk-perl module can be installed using perl's cpan shell, but since you need to fine-tune the build, the best way is to do it manually:
1 - open a terminal, then type
wget http://search.cpan.org/CPAN/authors/id/M/ML/MLEHMANN/Gtk-Perl-0.7009.tar.gz
to download the source code.
2 - decompress the source code:
tar xvf Gtk-Perl-0.7009.tar.gz
3 - enter the build directory:
cd Gtk-Perl-0.7009
4 - configure the source code and then build it:
perl Makefile.PL --without-gnome --without-applets --without-glade --without-gnomeprint
make
5 - install it:
su
make install
That should do it
