I want to change to text to say Game Boards, instead of Forums. Is it possible to do that?

There are many many places where the word forum is used. Please could you advise where it is you are looking to change it?

On the front page just under the header, "Forums" is on the.left, and "start a new topic" is on the right. It seemed to be the default.

I would suggest taking a look here, which would be a good starting point for you

Or

Nice. I'll look into that now. thanks for th speedy reply 👌