The iPad 2 WiFi didn't have any GPS, it uses WiFi Positioning to geolocate hence the need to have WiFi on:

http://en.wikipedia.org/wiki/Wi-Fi_positioning_system

There are several good VNC clients for iOS, here are a few paid and free ones: http://www.thetechgadget.com/top-vnc-client-iphone-ipad-ipod...