[3] The 95.7 FM frequency debuted June 1, 1960, as KQBY-FM, companion to co-owned KQBY 1550, with 10,500 watts from Mount Beacon above Sausalito, California.

KQBY had been the original Top 40 music station in the Bay Area, garnering a huge market share for owner Dave Siegel.

After competition eroded listeners, the station was sold to former child actor Sherwood R. Gordon, who changed the format to "beautiful music".

When he ran low on money, the staff was cut to a bare minimum and the format was changed, this time to classical music.

New owner Buckley Broadcasting retained much of the staff and improved "The Classic Stations" format, attracting prestige-seeking advertisers.

[9] WDRV's success did not translate to the Bay Area, and on August 11, 2003, the station turned to a country music format as KZBR ("95.7 The Bear").

The familiar voice of "Station 'owner' J.J. Maxwell" or "Max" was actor John O'Hurley, perhaps best known for his work on Seinfeld as catalog king J. Peterman.

"It's unexpected and a bit irreverent," said Bonneville's Senior Regional Vice President and general manager Chuck Tweedle.

The end of Max FM was notified beforehand with an e-mail sent out that morning to listeners, and shortly after 2 p.m. that day, Max's website went offline, replaced with a message thanking listeners, giving a brief goodbye message, and telling listeners that they were "preparing a brand new radio station that we believe you will like even more than Max", promoting that it would "be fun, energetic, Bay Area focused and unlike any other station in the area", promoting said format's launch at the time aforementioned, and ending by saying "we sincerely hope you join us for the ride."

On April 16, 2007, The Wolf brought in The Y'all Turnative Morning Show with Gill Alexander, LeBaron Meyers, Marcus Osborne, Sue Hall and Eddie King.

[26] On August 25, 2016, the Golden State Warriors announced that KGMZ would be their new flagship station for the team, moving all of their game broadcasts and pre-game and post-game shows from KNBR.

[28] Additionally, for the 2018–19 season, USF Dons men's basketball broadcasts moved to KGMZ-AM, with KGMZ-FM simulcasting two games.

[33] KGMZ-FM is rebroadcast on the following FM Booster: ** = Audacy operates pursuant to a local marketing agreement with Martz Communications Group.