Geffen, who is openly gay, was the subject of a persistent but false 1990s rumor that he had married actor Keanu Reeves. Before he came out, he dated Cher and Marlo Thomas in the late 1970s. According to ("The 400 Richest Americans of 2004") and other sources, Geffen has pledged to give whatever money he makes from now on to charity, although he has not specified specific charities or the manner of his giving.
In 2002, he announced a $200 million unrestricted endowment for UCLA Medical School. Geffen's Malibu home on the Pacific Coast Highway has been a battlefront in an ongoing struggle between property owners and beachgoers over access to public beaches in front of private residences. In 2002, Geffen sued to block access to the public beach in front of his home.
In 2005, facing a rising tide of anger, Geffen relented and allowed access through a non-profit group. Garry Trudeau parodied this dispute in his daily comic strip Geffen, who is openly gay, was the subject of a persistent but false 1990s rumor that he had married actor Keanu Reeves.