That would be for him to discuss, not my place. I only maintain the targetted warning code. That's the max extent of my involvement in Peace of Mind and related.
That said, I agree with the decision to maintain the "unsupported" banner on this; mDiyo and Greg agreed to never be included in the same FTB Pack, I intend to keep the code warning this situation is the norm and we will not provide assistance for GT-containing installations. That's just our policy on the matter.
Questions about such should be directed to the IRC, which is an open place on such matters without the moderation-bias of forums.