Does that not block some of your view of the road over the hood? If not, I like that spot!
My Garmin inReach on my windshield in the earlier photo is what I use as my GPS antenna for my iPad. It's also a satellite messaging system that can get me out of a jam if I get into trouble by myself. But there are other antennas out there that can talk to your iPad via Bluetooth as well.
Check this out.
Heres my setup