Hello POA, I got a call from the avionics shop doing our install yesterday, they are basically done with our panel upgrade. Pull the KLN 94, KX 155a #2, KR 87 ADF, and KT 76c. Installed GNS 530W (We have other places with GNS 530w's and we wanted to keep things the same), G5 HSI W/ GAD29b, GTX 345. The shop says the G5 HSI doesn't output the right information/flags for the autopilot to track a VOR. I had not saw or heard of this limitation. I called Garmin support, they don't seem to know anything about it either. I emailed the shop and asked that they check with their Garmin rep to verify. The plane had a KI 209 and a DG before with the switcher/annunciation panel. It's/was a 172R Nav II Panel. Has this been a known thing and I just missed it? Anybody flying with a similar setup that can speak first hand? It's probably not a huge deal, but it's bugging me... Thank you for the help, let me mow if I missed some critical info to help answer this.