$ sudo apt-get update
$ sudo apt-get install gkrellmwireless 

gkrellmwireless is installed in your system.

Make ensure the gkrellmwireless package were installed using the commands given below,

$ sudo dpkg-query -l | grep gkrellmwireless *

You will get with gkrellmwireless package name, version, architecture and description in a table

gkrellmwireless package basic information: