It's not entirely known, but probably agnostic. Agnostic people are unsure of the existence of a god. Atheists lack the belief of any gods.
See related link for quotes from Bill Gates on the subject.
Microsoft Cofounder and CEO, was interviewed November 1995 on PBS by David Frost. Below is the transcript with minor edits...
Frost: Do you believe in the Sermon on the Mount?
Gates: I don't. I'm not somebody who goes to church on a regular basis. The specific elements of Christianity are not something I'm a huge believer in. There's a lot of merit in the moral aspects of religion. I think it can have a very, very positive impact.
Frost: I sometimes say to people, do you believe there is a god, or do you know there is a god? And, you'd say you don't know?
Gates: In terms of doing things I take a fairly scientific approach to why things happen and how they happen. I don't know if there's a god or not, but I think religious principles are quite valid.
The artificer here is the term agnostic. Agnosticism is not a position on belief, it is a position on knowledge. The prefix A means without and Gnostic refers to knowledge, hence agnostics do not claim to have knowledge of the existence of any gods. Belief is a binary position, either on believes in some proposition or one does not, there is no middle ground (no one can half-believe something). Given his comments Bill Gates appears most likely to be an agnostic atheist, that is a person who does not believe in any gods but does not claim to know that they don't exist.
Bill Gates has stated that he does not subscribe to any organized religion, but he has not explicitly identified as an atheist. He has expressed openness to various spiritual beliefs and practices.
He has described himself as an atheist. But according to a Wikipedia page he's agnostic.
Bill Gates is an atheist. It is possible that he believes in the existence of Jesus as a human being, but he does not believe in him as a savior. See link for more info.
Judging by how much he does for others considering what he has, I would have to say no.
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Bill Gates is married.
Bill gates
Bill Gates Foundation (Obviously)
Bill Gates is from Seattle, Washington, in the United States.
Microsoft is partly owned by Bill Gates. Bill Gates also owns the Bill and Melinda Gates Foundation. Bill Gates also owns part of Corbis and Berkshire Hathaway.Microsoft
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Bill Gates
Bill Gates' last name is Gates
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Bill Gates
yes bill gates had a son.