Love, the former leader of the band Hole and widow of Nirvana frontman Kurt Cobain, said Gibson had showed up at a Beverly Hills, Calif., hotel room while she was doing drugs with several men.
"Mel kept coming to the door with this cheesy grin going, `Hi!"' Love said in an interview with Diane Sawyer that aired Tuesday on ABC's "Good Morning America."
"I just kept looking at him going — I can't cuss — um, `Blank off!' ... I know him and he's a nice guy. It didn't matter who it was. It could have been Jesus. I didn't care," the 42-year-old rocker-actress said.
Love said Gibson, accompanied by addiction counselor Warren Boyd, left with the men "to have a cheeseburger" while Boyd talked to her about seeking treatment.
It wasn't clear when Gibson had intervened. Alan Nierob, publicist for both Love and Gibson, declined comment, in an e-mail to The Associated Press on Wednesday.
Gibson sought treatment for alcoholism following his drunken-driving arrest and his rant at a police officer in late July. The 50-year-old actor-director starred in the "Lethal Weapons" movies and directed 2004's "The Passion of the Christ."
In September 2005, Love was sentenced to 180 days at a drug treatment facility for violating probation in three criminal cases. In February, she had pleaded no contest to a misdemeanor assault charge and was sentenced to three years' probation. She was already on probation in two unrelated drug cases.
Love has written a memoir, "Dirty Blonde: The Diaries of Courtney Love," and says she is practicing Buddhism.
She also said her 14-year-old daughter, Frances Bean Cobain, is "fantastic" and doing well in school. "She didn't see me on drugs very often — once or twice, maximum," she told Sawyer.
Love has appeared in films such as "Man on the Moon" and "The People vs. Larry Flynt."