The gtk+ package contains the GIMP ToolKit (GTK+), a library for creating
graphical user interfaces for the X Window System. GTK+ was originally
written for the GIMP (GNU Image Manipulation Program) image processing
program, but is now used by several other programs as well.
If you are planning on using the GIMP or another program that uses GTK+,
you'll need to have the gtk+ package installed.