> The USG has limited capabilities on technologies from GPS chips

Are you referring to Selective Availability? That ended decades ago.

Selective Availability accuracy restrictions ended decades ago, but GPS technology is still subject to various military and export-control restrictions.

Not selective availability. COCOM Limits that prevent a GPS chip from operating above a certain speed and altitude.

It’s funny because it’s just (relativistic) math. It would cost a couple hundred bucks to roll your own with no restrictions.