Overview
Talk radio is a GTA fixture. Vice City had VCPR and K-Chat, San Andreas had WCTR, and GTA V continued the tradition with West Coast Talk Radio and Blaine County Radio. A GTA VI talk station, carrying fake news segments, absurd commercials, and call-in satire of 2020s culture, is one of the most predictable inclusions in the whole lineup.
"Leonida Talk Radio" is a fan placeholder. No talk station, host, or format has been officially confirmed for GTA VI.
What we actually know
Confirmed: nothing specific about a GTA VI talk station. The expectation rests entirely on the franchise's unbroken history of including one. The advertising and satire content is where GTA traditionally lands some of its sharpest social commentary.
Trivia
GTA talk radio often doubles as meta-narrative, with in-world news that reacts to the player's crimes as the story escalates. Whether GTA VI keeps that dynamic is unconfirmed but heavily anticipated.