And IC speaking, Gustav knows nothing about a collection of Zuma nobles. He just knows about Garret sending ultimatums and vague rumors about a leader.
Amazing enough, IC Juan knows nothing of Gustav. He barely knows about Allison, what is your point. If Gustav doesn't wish to educate himself further about a realm that is just south of him, that is ENTIRELY his choice. Unless what you are trying to say is that part of Gustav's character is that he is incapable of learning or showing curiosity. In which case, well who really cares he is obviously a hopeless case even if we sent him off to learn about Zuma school.