Because 1530 AM is a clear channel frequency reserved for KFBK Sacramento and WCKY Cincinnati, KGBT reduces power at night to 10,000 watts to avoid interference.

[2] In 1941, McHenry Tichenor, former publisher of the Valley Morning Star newspaper, broke ground on a new radio station at a site known as Harbenito, between Harlingen and San Benito.

Three thousand residents attended the station's open house to see a modern studio facility, a scaled-down version of his KTHT in Houston.

[9] Two years later, effective September 1, 1953, KGBS bought the KSOX facilities and moved its entire intellectual unit there, including its CBS Radio affiliation.

[10] On New Year's Day 1954, KGBS became KGBT, matching the TV station, which changed its call letters on December 9, 1953.

On June 3, 2022, Univision announced it would sell a package of 18 radio stations across 10 of its markets, primarily AM outlets in large cities (including KGBT) and entire clusters in smaller markets such as McAllen, Texas, Fresno, California, and Las Vegas, Nevada.