Clients do not have a copy of the game mode. It only ever exists on the server.
Listen Server “HOST” is also the server, thus it will have a copy of the GM. But the overall process is to have the Client RPC to the Server, then have the server call the event.
So…
- Client controller → RPC Controller on Server
- Controller on Server → Call GM event
- GM event can then send the info back to the server controller
- Server controller RPC (on owning client) the info.