Thats correct.
In my current beta tests, I can turn the heading knob on the grt, tell the grt to use the heading bug, and wallah, the Trio turns to follow the heading.
Right now its the wrong heading, but they know that and the code I have was built before they had the correct AIRINC labels from GRT. Mine follows wierd numbers. But if I turn heading left, it goes left. Just a bug that they know of and are fixing.
Other items are in progress.
Last I spoke to em a week ago, they were fitting a local plane with equipment to testing the grt airinc interface. With this in place, they will make rapid progress based on my experience with them.
I too have been waiting for this functionality. My 2 HHX screens are my primary means of navigation and this is key to my Trio success going forward.