Blizzard: don't know what provider you have but Sprint NAV toggles what yor looking for. That said I like Google NAV better. Keep in mind Google NAV is still in Beta so if I were you I'd suggest that option it's a good one
The distinction is important whether you get it or not. The GPS receiver and your GPS app are entirely separate entities. You'll have better luck with discussions if you don't blow off others trying to inform you. Google has nothing to do with your GPS receiver. They have everything to do with Google Maps/Nav.
We can infer from context that "Google GPS" means Google Maps/Nav but even Google makes far more than just one GPS-enabled app. Being clear on what you mean benefits you.