Create shell elements on a surface

Is there a way in Creo Simulate to use a surface to create shell elements?  This is not a midsurface shell compression.  I created a simple "L" solid part with a surface extrusion.  I thought the autoGEM control "hard surface" would achieve what I wanted.  But it doesn't.  Is there a different setting that will accomplish this?  I've attached photos of the part and the part meshed.