GX2200 Gray NMEA Out + to Garmin Brown RX + (NMEA IN +)

GX2200 Brown NMEA Out - to Garmin Black NMEA Ground – 

If you want connect the Garmin GPS output.

SH Blue In+ to Garmin Blue Out + 

SH Green In- to Garmin NMEA Ground Black 

You will need to change the Communications Settings in the Garmin for Port 1 to NMEA HS (High Speed) data. You will also need to change the NMEA Baud rate in the GX2200 to 38400 (High Speed) in the General Setup Menu - NMEA In/Out.