The whole thing is a bit non-specific. I think the CMP wanted to recognize that there is supposed to be GFP under the PV system without adding any specific requirements.
Here's how I read it.
230.95 requires GFP basically on grounded 4 wire 480V 1000A+ services. It does not state that but that's what it was supposed to target. There is an exception for some industrial processes.
It does not say what the GFP setting has to be, as long as it is less than 1,200A. Kind of leaves a lot of leeway here. The load might be what defines the maximum GFP setting since the whole GFP concept was to protect equipment.
If you have one of these and you want to put in PV you basically don't want to to mess up the existing GFP settings without knowing why they are set where they are.
What is the existing GFP setting? Is it 500A, 1,000A? Do you know why it is set there and what an acceptable setting is?
How much ground fault current will the PV system add?
If it's 1,000A now and you are installing a PV system with a 100A ground fault contribution then you want to look at either increasing the ground fault amperage to 1,100A, still below the 1,200A limit, or reducing the main GFP trip to 900A so the total is 1,000A. It's not well defined in the NEC because it's really a limitation of the load equipment.