The cron job code is provided in the readme files. You have to make sure your host allows cron jobs to be set by clients (usually via C-Panel), and if so, you have to know if there are limitations on the way the cron is set up. (Some hosts, for example, don't allow "wget" commands.
There are tutorials on the WWW explaining how to set up a cron job - C-Panel usually allows you to use a "standard" or "advanced" interface.
Look at the cron command instructions provided in the googlebase mod readme files, then, in your c-panel cron screen, toggle between the "standard" and "advanced" input screens - you'll see what is required.