Gavin is a creator/writer/show runner and executive producer of many NZ and international shows.

He wrote Testify, a five-part series for Warner Bros and wrote Black Hands, a true-life drama, also for Warner Bros NZ. He was co-creator of Bad Mothers and co-creator and show runner of Hyde & Seek, an eight-part thriller, both screened on Australia's Channel 9. Gavin was co-creator and writer on two seasons of Filthy Rich (winner of best drama at the 2019 Seoul International Drama Awards) for Filthy Productions. He wrote the historical telemovies What Really Happened – Votes For Women and What Really Happened – Waitangi. Gavin co-created the hit television shows Go Girls and Nothing Trivial (for which he won best script at the New York Film and Television Awards) and was show runner and writer of the critically acclaimed mystery thriller This Is Not My Life.

The Call is his first novel.

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