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GPS position out to Garmin radio?

Posted: Mon Aug 02, 2021 3:48 am
by MikeBlackburn
I have a G3 iEFIs with a Garmin GTR225 radio.

The radio can be controlled from the EFIS but some of the functionality of the radio depends on a GPS position source. From my understanding of the radio install manual it accepts RS232 in which I presume is currently the method whereby the iefis controls the radio. Is there any way to get the EFIS to broadcast the gPS postion (SL30/40 format?) to the radio along that same connection?

Not sure if this makes sense?