Alternate ref pitch for guitar; how?

Hi all…I thought I had asked this previously but Ill do it again just in case

I tune all songs and projects to 432. I have for a couple of decades. Last time I tried using MG2, I remember it not working as it was jumping chromatics/fluttering all over the place. When I tune to 440 it works well esp having a history of using guitar synths since the 80s…I only just sold my only Axon rack but I would still like some midi synth here and there…

Question is…where is there a reference tune parameter

OR

How do others handle this?