$ sudo apt-get update
$ sudo apt-get install gnuboy-svga 

gnuboy-svga is installed in your system.

Make ensure the gnuboy-svga package were installed using the commands given below,

$ sudo dpkg-query -l | grep gnuboy-svga *

You will get with gnuboy-svga package name, version, architecture and description in a table

gnuboy-svga package basic information: