[GPSNavX]

Make sure you have selected in the GPS panel Settings drawer Port KeySerial1, Rate 4800, Type Other or Garmin is fine. When data is coming from the GPS you will see the UTC field in the GPS panel update. Don't bother with the Autopilot until you get the GPS NMEA data coming in. You can also check the GPS panel Monitor drawer for data reception (be sure to select [Start]).