$ sudo apt-get update
$ sudo apt-get install gnustep-base-examples 

gnustep-base-examples is installed in your system.

Make ensure the gnustep-base-examples package were installed using the commands given below,

$ sudo dpkg-query -l | grep gnustep-base-examples *

You will get with gnustep-base-examples package name, version, architecture and description in a table

gnustep-base-examples package basic information: