GPS

That sounds like something is not working. GPS is always on. AFAIK, there is no switch or setting to turn it on. Maybe the GPS antenna or GPS module itself is broken?

 

is the car new to you?

 

Did you hit the home button? That should recenter the map to your present location. You might have used the pinch to zoom function to move the map relative to your location at that time. I don't think I've ever left it like that so I don't know for sure, but it might retain that position after you shut off the car and restart it.

 

Also, whatever kind of map it has, it may not be able to read the map data.
I"m afraid that you need to see a dealer.

 

once a year or so should be enough, don't fill it all the way next time, unless you feel the need to have a full tank for emergencies.
i only keep 2-3 gallons on board, unless i'm going to travel.

 

You still have time before worrying about it. From your Owner's Manual, page 96:

 

You might be right. I tested my idea yesterday. Before turning off the car, I scrolled the map several miles sideways and left it there when I shut off the car. When I restarted the car, the map was centered, so it doesn't remember the offset.

As mentioned, the gas should be good for a year.

BTW, a tip on forum ease-of-use: you can save time and work by hitting the quote button on several replies and putting the all in one reply as I have done here.