"Everything is going well."
Translation:Alles gaat goed.
It's unusual to say Alles is goed, maybe it can be used for some static situation, but right now I can't think of a situation in which I would use it. Alles gaat goed is a very common sentence. Gaat indicates the way it is going now in contrast to is which is a fixed state. In other words everything changes all the time, but this is the way it currently is going.