He had the tools. Own position map with terrain GPWS shading, backed up with the Garmin. Plus an autopilot. Could have stayed coupled on heading and altitude and bored along until he could descend to VMC, or punched off the autopilot before going into cloud and maneuvered lower to stay visual. Unprepared for the decision. I’ve trained a few owner/pilots that have two or three screens up but nothing meaningful on them for the conditions. The shaded EGPWS page is a good start.