HIRWA was born in Bujumbura, Burundi in 1985, to Ladislas Kayibanda and Olive Mukazera.
He was their only son, and had three sisters, among them reigning Miss Rwanda Aurore Kayibanda Mutesi. Hirwa attended his primary education in Burundi, before returning to Rwanda with his family, where he completed his secondary education at APAPE before joining Kigali Institute of Management (KIM).
Hirwa started his music career as a dancer with Cool Friends Crew, where he met Skizzy.
KGB is famous for songs such as Abakobwa b'iKigali, Ruhurura and Bibi.