Sorry that this 5-day later response is going to be so underwhelming. I'm not sure if you tried to attach a picture, but I can't see how it actually looked on the Arcade.
I would definitely represent that rule as you suggested, just crossing out GK
I'm pretty sure there's a checkbox below any post (before you post) saying "notify me when answered." I see it on mine, but maybe that's just because I'm a moderator. Do you not see it when you post?