fakegps

A manual setting for GPS can be stored using a console/Telnet connection

fakegps 50.012345 -2.012345

The format is Degrees Decimal and they can be obtained from https://www.findlatitudeandlongitude.com/l/mhs/3922079/

To use Fake GPS, first determine your GPS coordinates in degrees only. Eg. N45.35165 W76.04777 Ditch the N,W,S,E prefixes, replacing W and S with a minus sign: 45.35165 -76.04777 Google Maps and smartphones are among the ways to determine those coordinates.

If an Internet connection is established then the time will be obtained from an NTP server.

If no Time or Location is stored then the OLED will not display the GPS screen.

https://www.cloudynights.com/topic/854327-homebrew-gen3-pcb-wifibtgpsmusbrelay/page-42#entry13139022