the biblical answer is that only those who belong to God go to be with Him (i.e. go to so-called heaven), and that only those who give themselves in repentance wholly over to Jesus Christ as their Lord and Saviour belong to God ...
and as far as the bible is concerned, there are many false gods but only one God who revealed himself progressively and redemptively in history as recorded in the bible
if want to believe in your own man-made god and your own version of heaven and salvation, you are free to do so at your own risk
