Xbox game pass paid?

Have brought it to me, I can now play the games until it has expired or do I have to pay for it when it has expired

When the game pass expires, you can no longer play the games, so you would have to extend the game pass or buy the game.

You only have the games in the gamepass until you have the gamepass.

You can play the games as long as your Game Pass is active. No game pass means no more playing the offered games.

But it can't expire because it is a subscription that you have to cancel yourself.