The Wifi version of iPad does not have a GPS chip, as B00bie stated. The xMotion people are correct, of course.
However, if you get a GPS receiver, such as this one
Amazon.com: Dual Electronics XGPS150 Universal Bluetooth GPS Receiver for iPad 2, iPad, iPod touch, iPhone and Other Smartphones, Tablets and Laptops: Electronics
which will link with your iPad via a bluetooth connection, then you can make the wifi-only iPad GPS enabled. And actually, this solution offers some advantages over having the GPS chip inside the iPad, as you can position the receiver for optimal reception when in a car, which is a lot harder to do with an iPad. Also, you can use this receiver with other devices such as laptops.
Hnhassan said:I bought a similar GPS add on that plugs on the bottom of my iPad 3 wifi only version.
Yes it does work as a sat nav device, although the satellites may take a little time to kick in at first.
Here are some things to bear in mind. Firstly there is no active traffic... Which to me is important if you're around a city with loads of traffic. Simply because you need a 3G. If you're not sure what active traffic is,it basically tells you where there is expected or reported traffic on your route and based on this, your sat nav software will re-route your journey.
Also, a lot of mounts you'll find out there is quite flimsy and the iPad shakes like it's going to fall off.
All in all I have stopped using it as a sat nav, simply because a) I need active traffic. B) I can't be bothered to plug in all the gadgets like bracket, and GPS receiver to get it to work, it's easier to just plant my iPhone and it's all working. Of course you don't get the big screen which is a great shame!
If I knew how this worked, I would have gotten an iPad 3 with GPS/4G but without a plan... Oh well.