I use self-compiled Ghostscript 9.15 rc 2 on SUSE Linux. In /usr/share/doc/packages/ghostscript/Fonts.htm the section "Ghostscript's free fonts" seems to be outdated. E.g. it still shows the no longer working download URL ftp://mirror.cs.wisc.edu/pub/mirrors/ghost/fonts/ It seems meanwhile Ghostscript's free fonts are under http://downloads.ghostscript.com/public/fonts/ Also the tarball names in the "Font packages" table seem to be outdated.
I believe Fonts.htm is now up to date (basically, most of the links have been removed as a) they no longer exist, and b) there are plenty of other, better quality fonts available documented elsewhere).