Please branch and build perl-Gtk2 in epel9. If you do not wish to maintain perl-Gtk2 in epel9, or do not think you will be able to do this in a timely manner, I would be happy to be a co-maintainer of the package (FAS: neil); please add me through https://src.fedoraproject.org/rpms/perl-Gtk2/adduser
there is a cycle between perl-Gtk2 and perl-Pango - i was able to build for epel9 in my copr by bootstrapping perl-Pango without GTK, before rebuilding it after https://copr.fedorainfracloud.org/coprs/neil/remind