If you look at both of these units, they seem to be the same. The GNET is just rebranding of the lockpick... the installation manual looks the same and it uses the same mute/window lock buttons to make it work.
Someone tell me I'm wrong as I'd like an option to the lockpick, also (all I want to do is enter data to my NAV while driving... why is that so hard to allow? Heck, I'd be happy to use voice commands to spell out the destination as well, but that feature is gone... I think I saw it a few years ago in another Caddy, but I don't remember which).