Before I buy... is PinePhone actually open source?

[ryo]

So basically if I want to be sure GPS is not on giving my location to Xi Jinping's CCP automotons

If not China, you'll give it to Russia, which shares with China.
If not Russia, you'll give it to USA, which shares with Russia.
If not USA, you'll give it to EU, which shares with USA.
If not EU, you'll give it to Israel, which shares with EU.
And so on.

As long as it's a device that emits at least 1 wireless signal, you're guaranteed to give away your location.
And you can put it completely on wires, but as soon as you get a phone call, you're tracked again.
Even desktops are tracked, your ISP does that.

Open source doesn't eliminate tracking entirely, but it does eliminate tracking on their side, which limits the amount of information and its accuracy collected.
So you can't become entirely anonymous, but you can make yourself less accurately identifyable.

So the only way to stay away from any kind of tracking, will be to lock yourself up in your home, cover all your windows, wrap all your walls off in aluminium foil, sell every gadget you have, and don't use any technology at all.