I'm not too sure what the problem is then. I'm able to use the maps with gps without internet. All i do is click outside of the box when it asks to select a connection. However, since I do not have a data plan, I have turned off Network positioning under Location in settings. The gps signal works fine, although it takes a bit longer to obtain a signal. I'm only able to get a signal outdoors with a clear view of the sky though.

I have a question for you, did you follow the steps on that website to download the maps onto your headset? I have yet to try it.

Edit: Seems like this is what maxximuscool said.