I thought not :-)
I guess I can just twiddle the altitude knob on the GFC500 to the rounded up minimum nearest 100ft for an MDA - but then I suppose I would want to set it to the first altitude of the missed approach segment anyway, so perhaps pointless? Still learning both this device and...
I have seen it done when you have a PFD like a G3X Touch - is there a way to enter the minimums for an approach when you only have the GTN650Xi and dual G5s?