an easy and consistent way of installing software ported to FreeBSD
pkg-descr
gnuboy is a portable program for emulating the Nintendo GameBoy Color
software platform
You can find public domain ROMs at SubPort.org
WWW: http://gnuboy.unix-fu.org/
FreeBSD
FreeBSD is a Unix-like free software operating system descended from AT&T UNIX via the Berkeley Software Distribution (BSD) branch through 386BSD and 4.4BSD.