$ sudo apt-get update
$ sudo apt-get install gkrellm-radio 

gkrellm-radio is installed in your system.

Make ensure the gkrellm-radio package were installed using the commands given below,

$ sudo dpkg-query -l | grep gkrellm-radio *

You will get with gkrellm-radio package name, version, architecture and description in a table

gkrellm-radio package basic information: