Through some research, I've been able to answer my own question regarding Apple's Wi-Fi only tablets, their lack of built-in GPS, and whether (or not) GPS data can be attained via Hotspot/tethering to a data connected cell phone. Someone by the name "Aero9K" posted the following within Apple's own support forum. For anyone considering getting an iPad Mini to use as their P3 controller tablet, you will not only find this illuminating, but you should find out providing very strong reasons to NOT consider crApple gadgets. Here is Aero9K's posting:
There's a lot of misinformation floating around in this thread. I'm going to stick to facts.
1. The Apple website clearly states that the Wi-Fi only version does NOT have a built-in (hardware) GPS.
2. I had an unexpected opportunity to test this on my iPad mini w/ Retina Wi-Fi only version while traveling through rural North Carolina this week. I had the hotspot activated on my Android phone and the iPad was successfully passing data in both directions. At no time during my trip, could the iPad determine my location.
2.1. An internet connection is required to load the map imagery when using Google maps on the iPad. This is also the case for the included maps/nav app which is actually some cooperative with TomTom. The included app does seem to cache map data that you have previously downloaded. I'm not sure how long it holds it in cache.
I've recently converted to iPad and assumed the class leader would include a hardware GPS capability. Much to my disappointment, it does not. I need the hardware GPS capability and agree with many here that it should be included in the Wi-Fi version. I don't care that Apple chooses to employ an integrated GPS/Cellular chip.
As a result, you'll find this iPad on eBay before the night is over. I'll be picking up an Android tablet, today, that DOES have an integrated hardware GPS without requiring me to purchase the much more costly cellular hardware to get it.
There's you have it...the truth. Apple's propensity for proprietary hardware has, over the years, caused a number of problems for people. With their decision to create/use a combination cellular/GPS chipset, this eliminates anyone's ability to use any of their Wi-Fi only tablets with the P3s, if you want/need GPS location. This also leaves me, as well as anyone else considering an iPad Mini, in a bit of a dilemma - spend an extra $130-180 on the "cellular version" of your chosen iPad (Mini, Air, etc)...or save yourself a LOT of money, and stock with an Android tablet. Once again, the (realistic) best bet appears to be a Nexus 7 (2013, Wi-Fi or LTE model), nVidia Shield, or Asus ZenPad S 8.0 (either already-released 32GB Z580C-B1 ($199), or the soon-to-be-released 64GB Z580CA-C1 ($299)). While I've already spent money on a case, & tempered glass screen protector for the iPad
Mini 2, returning the iPad
Mini 2, taking a financially loss on the accessories, and re-buying the Z580C, might be the better, smarter, and more financially-feasible decision. I'm EXTREMELY sorry I ever gave Apple another chance.