This package installs X11 support library which adds the following
devices to the installed Ghostscript:

  x11, x11alpha, x11cmyk, x11cmyk2, x11cmyk4, x11cmyk8, x11gray2,
  x11gray4, and x11mono.

WWW: http://www.cs.wisc.edu/~ghost/doc/GPL/index.htm
WWW: http://www.ghostscript.com/