Built on top of FreeBSD, GhostBSD provides a simple desktop-oriented operating system pre-configured with the carefully selected minimal commonly used set software required to start using it to its full potential.
GhostBSD uses the GTK environment to provide a beautiful look and a comfortable experience on the modern BSD platform offering a natural and native Unix work environment.
It is BSD
GhostBSD is derived from FreeBSD, and its roots go back to the University of California Berkeley Unix Research. Historically it was referred to as "BSD Unix" or "Berkeley Unix." However, today it is simply called BSD for Berkeley Software Distribution.