The Gill Foundation is an American philanthropic foundation. It is one of the largest funders of efforts to secure full equality for lesbian, gay, bisexual ll and transgender (LGBT) people in the United States. The foundation's mission is "to secure equal opportunities for all Americans, regardless of sexual orientation or gender identity and expression." Based in Denver, Colorado, the foundation has four board members: Tim Gill, Scott Miller, Mary Bonauto, and Eliza Byard.