Binary descriptions:

ghostscript: interpreter for the PostScript language and for PDF
ghostscript-dbg: No summary available for ghostscript-dbg in ubuntu artful.
ghostscript-doc: No summary available for ghostscript-doc in ubuntu artful.
ghostscript-x: interpreter for the PostScript language and for PDF - X11 support
libgs-dev: No summary available for libgs-dev in ubuntu artful.
libgs9: interpreter for the PostScript language and for PDF - Library
libgs9-common: No summary available for libgs9-common in ubuntu artful.

Last common version:

9.20~dfsg-3.2