After learning various instruments, Gilles Doneux turns to composition and integrate in 2005 the Royal Conservatory of Mons (Belgium). There, he obtained in 2010 a master's degree in composition (in the class of Claude Ledoux) and in 2011, a master's degree in classical writings (in the class of Jean-Pierre Deleuze). He is currently Ph.D candidate at the University Paris 8, where he explores the relations between instruments and digital sound processing in live electronics music. In his music, Gilles Doneux tries to combine his interest in sound introspection with a reflection on the social and cultural phenomena.

He was commissioned by ensembles such as Musiques Nouvelles, Nikel, Sturm und Klang, Soli-tutti, Royal Chamber Orchestra of Wallonia, Maîtrise de la Loire, Ars Musica and Musicalta festival.

Beyond classical fields, he has also collaborated with several directors for theatrical creations: Laurence Adam (Que du bonheur !, Mais qu’est ce que j’ai fait de ma vie ?), Fabrica Piaza (Songe d’une nuit d’été), Isabelle Joniaux (L’oiseau bleu).