Ok I figured this one out - I was being a complete idiot and not seeing the blatantly obvious. The MyServerInfoGameMode is actually a game mode but I wasn’t setting the map gamemode to it so the casts always failed and thus nothing would work. I finally noticed this morning after I woke up and tried one last time to do something useful!
I’m not really that dense most of the time (hell I’m a stationary engineer that was top student in every course) but with this I was doing my Ralph Wiggum impression quite well!