Ok, well, there you can go ahead and ask any engineer that works on the design of these systems. I don't know what your training is, or what your profession is, but go ahead and find engineering information about GPS and you will see that you here very wrong here. That's extremely basic information about the GPS system.

Since you're not being very open-minded in this conversation, I recommend that we stop talking. Your resistance to basic information like this means you need to do some homework before denying physics concepts. It's not enough to reject them; you have to have evidence to reject a claim, and I recommend you take some basic physics online free courses (e.g. the OpenCourseWare from Yale's physics course by Prof. Ramamurti Shankar, freely available in its entirety on YouTube).

I've enjoyed some of our conversation and I wish you well.