gtk : GTK is a multi-platform toolkit for creating graphical user interfaces ( https://www.gtk.org/ https://gitlab.gnome.org/GNOME/gtk/ )
libadwaita : Building blocks for modern GNOME applications ( https://gnome.pages.gitlab.gnome.org/libadwaita/ https://gitlab.gnome.org/GNOME/libadwaita )
libpanel : A dock/panel library for GTK 4 ( https://gitlab.gnome.org/GNOME/libpanel )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a djs_overlay
For Paludis use this rsync : rsync://gentoo.zugaina.org/djs_overlay-portage
If you have a problem : ycarus(-at-)zugaina.org