Install libgtk3-perl by entering the following commands in the terminal:
sudo apt update sudo apt install libgtk3-perl
Description:
Perl bindings for the GTK+ graphical user interface library
GTK+ is a multi-platform toolkit for creating graphical user interfaces. Offering a complete set of widgets, GTK+ is suitable for projects ranging from small one-off tools to complete application suites. . This package contains the Perl bindings to GTK+, built using Glib::Object::Introspection. Generated bindings live under the Gtk3 namespace.
Homepage: https://metacpan.org/release/Gtk3
Version: 0.032-1
Section: perl