Im a little confused? Do Jews still think gentiles cant go to Heaven?

Jews don't have a fixed idea of what heaven is. Mostly we just refer to "The World To Come", and whether we go there upon death, or will remain dead until judgement when all will be resurrected, is a fun debate to have over the pertinent scripture. But, Judaism teaches that Satan is under God's control, there is no eternal punishment, and ALL the righteous share in the world to come, what ever that ends up being. Right action is stressed over right belief.