NMEA data streamed by an NMEA gateway, a multiplexer, or any other instrument broadcasting on a serial port via a USB connection is supported.
Prerequisites
Normally, direct transmission of the data stream to a serial port does not require a driver.
Setup

Open Settings by tapping the gear icon, then select GPS & NMEA. Once connected and data transmission enabled, select:
- GPS Source = NMEA
- NMEA Protocol = SERIAL
Press the “Scan NMEA Devices” button.
- Serial Port = the detected port should appear in the window.
- Baud Rate = 4800 bps by default.
The data stream should scroll in the lower window.