Getting Game Controller Reference from Anywhere

I am starting to build the game logic for the project im working on. I created a new blueprint called GameController to handle the logic/score/timer. There are a ton of different blueprints that need to update the GameControllers variables (score and timer) when their events fire.

How can I have a global reference to my GameController that all different blueprints can access, without having to set up a reference to it in every blueprint that needs access to those global variables?

I am somewhat new to unreal, so if I am going about this all wrong, feel free to tell me the optimal way to accomplish this!

Thanks in advance!