Could altitude (MSL) output be included in a future update?

[momo-888]

Thank you for your excellent work on this project!

The GNSS module in use (e.g., Ai-Thinker GP-02 / AT6558R) already outputs altitude in the NMEA GGA sentence (Altitude = MSL, meters). Would it be possible to parse GGA so that:

1. The UI shows Alt: xx.x m (MSL), and

2. If APRS is enabled, altitude is appended as /A=nnnnnn (feet, 6 digits) in the APRS frame?

This seems like a small addition (GGA field 9 = altitude, field 10 = unit M).
I’d be happy to help test. Thanks again!