gtk+ : Gimp ToolKit + ( http://www.gtk.org/ )
libnotify : A library for sending desktop notifications ( http://git.gnome.org/browse/libnotify )
libview : VMware's Incredibly Exciting Widgets ( http://view.sourceforge.net )
xpyb : XCB-based Python bindings for the X Window System ( http://xcb.freedesktop.org/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a gmt
For Paludis use this rsync : rsync://gentoo.zugaina.org/gmt-portage
If you have a problem : ycarus(-at-)zugaina.org