Sharing GPS signal to a Wifi-only iPad
"I'd say just try using the android phone as a Wi-fi hotspot" -  Matthieu Riegler

Unfortunately tethering makes no difference, the iPad uses known Wi-fi locations in its database to locate you. your tethering location won't be recorded or used.

Source: 2 days of trying different techniques and looking up workarounds. If tethered to a phone with GPS, but otherwise in a Wi-fi black spot, location will not be detected.

Apple has specifically disabled the GPS part of the Bluetooth stack for their non-GPS enabled machines, and then licence special GPS systems that can pass the information.

a standard bluetooth GPS is about $20, an apple enabled one begins at around $120, at which point it is cheaper to get a wifi enabled ipad.

Jailbreaking allows you to fix the disabled Bluetooth stack.

I'm still hoping to find a work around, but I haven't found one so far for their proprietary air print. people who have tried are removed from the app store.