[WildHighlander57]

QRS-11 is an IC used in a commercial navigation system:

https://fearoflanding.com/accidents/remote-control-boeing/

Here’s a picture of it:

http://www.systron.com/gyroscopes/qrs11-single-axis-analog-gyroscope-non-itar

[JustaTech]

That’s a rate sensor for inertial navigation. It senses and encodes G force. Nothing to do with GPS except at the sensor fusion level.