GROCO G-Gate Hub GROCO to GarminG Gate Hub GROCO to Garmin G Gate module uses the vessel's NMEA2000 (N2K) backbone to coordinate and display data from up to 40 E Valves (or other compatible devices) that are also operating on the N2K backbone. G Gate uses its embedded ethernet, HTML5, and TPC IP capability to function as an application server and to display control graphics on the vessel MFD. G Gate is a Garmin OneHelm industry partner. Power Requirements & Limits: For 12VDC