George W. Bush Silent on Same-Sex Marriage After Dad Helps Legalize One. Bush is the only living ex-president who has not endorsed gay marriage. Feb 24, · WASHINGTON, Feb. 24 — President Bush said today he supported a constitutional amendment banning gay marriage, declaring that such a measure was the only way to protect the status of marriage between man and woman, which he called "the most fundamental institution of civilization." In an. Former President George H.W. Bush has moderated his views on same-sex marriage since seeking the White House, according to a new biography.