...And other Game State theorists:
I've been seeing my name here kind of a lot!
If you haven't already, I invite you to check out my current rpg project, The Wizard's Grimoire & The Barbarian's Bloody Quest
, with more to come.
I think it aligns solidly with your Game State Model, and could provide a useful example for you. The games' structure upends the conventional RPG authority structure in a way that, I think, sheds light on how rpgs can, might, and do privilege non-shared in-game facts and continuity. Among other structural questions, they ask, "how much of the game state needs to be shared in order to create satisfying and meaningful continuity?" and they answer "not that much actually."
I also think you might super hate them. Maybe I'm mistaken and you'll love them! I don't know.
Either way, you might be interested, and there's a free downloadable preview that'll give you the gist, so I invite you to consider them.