Gerry Cosgrove, also known as Gerald Cosgrove, is an actor who provides the voice of fictional radio DJ Morgan Merryweather, host of Double Clef FM, in the video game Grand Theft Auto III, created by Rockstar Games.
In Grand Theft Auto: Vice City he calls Amy Sheckenhausen on K-Chat, a talk station featuring popular (fictional) characters from the game. He appears again as Morgan Merryweather.
The game Grand Theft Auto: Liberty City Stories takes place in the same city as it was in GTA III: Liberty City. In 2001 he will be the host for Double Clef but now it's DJ Sergio Boccino. But he calls the station and says: "The programming on Double Clef FM has really gone to the dogs!". At the end Sergio says something about why he doesn't go to the Liberty Tree (GTAs fictional newspaper). Few years later (2001) he's writing for this paper.