? iFly GPS Driving GRT autopilot

Is there anyone who has experience driving a GRT autopilot system with the iFly 700 series GPS? I am curious how well it works and if you rubber band a course change if the autopilot responds to the change? Also, does it start the turns prior to the waypoint so it leads into the new course?

GPS

You have to have GPSS to anticipate turns that requires Arinc 429 if you have the IF-740 provide gps info to efis and efis arinc to A/P then yes.Other wise it starts turns at way point .
Bob