He is best known for producing Bridge's "Needy", and "Searching", Cruel Santino "Gangstar Fear", Lady Donli "Cash", BOJ's "Awolowo", "Bill Up", and "Assignment", and Burna Boy "Different".
In 2013, he launched his career on SoundCloud, as a rapper, following the release of "Sounds Of The Future", featuring Cruel Santino (credited as Ozzy B) & Yung from the music group L.O.S.
On 24 April 2016, he released his extended play Long Live the King,[5] exclusively on SoundCloud, with guest appearances from Odunsi (The Engine), Genio Bambino, Bridge, BrisB, and Cruel Santino.
[6] In a review for Pulse Nigeria, Abiola wrote "Long Live The King is a pleasing story-telling work of art by ThatBoyGMK that would leave you wanting more".
In the same year, he opened for Cruel Santino, and Wavy the Creator, at The Lucid Lemons Curd 2 music and art showcase, held in Lagos, on August 5, 2017.