Some say he is athiest, but his response here seems pretty agnostic to me. Can't speak for Melinda.
Gates 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.
Melinda Gates, Bill Gates' wife and co-chair of the Bill and Melinda Gates foundation, was born in Dallas, Texas on August 15, 1964.
Bill & Melinda Gates Foundation 500 Fifth Avenue North Seattle, Wa. 98102
Fan Mail Address: Bill Gates Bill & Melinda Gates Foundation P.O. Box 23350 Seattle, WA 98102 USA
Melinda Gates (wife of Bill Gates) is 53 years old (born August 15, 1964).
Melinda Gates
Bill Gates married to Melinda French in January 1, 1994
Melinda Gates, Bill Gates' wife and co-chair of the Bill and Melinda Gates foundation, was born in Dallas, Texas on August 15, 1964.
I'm doing a report on him and it is called.................... the Bill & Melinda Gates Foundation
Melinda Gates (born Melinda Ann French) is the wife of Microsoft co-founder Bill Gates. A former Microsoft product unit manager, Melinda is now Co-Chair of the Bill & Melinda Gates Foundation.
Melinda Gates.
In 2000!
Bill & Melinda Gates Foundation
Bill & Melinda Gates Foundation is the name of the charitable trust started by Bill Gates and Waren Buffett.
Melinda Gates
Bill Gates Foundation (Obviously)
Bill & Melinda Gates Foundation.
Because he loved her