It was at the age of eight that Gilles Rocha entered the Concordia music school in Vétroz, his village society, and received his first baritone lessons from the famous Swiss composer, Bertrand Moren. Very quickly, he won several cantonal and national competitions. Internationally, he obtained two second places in a row at the Intermusica competition in Birkfeld, Austria (2006 & 2007). In 2009, during the Brass Band World Championship in Kerkrade, he won the prize awarded to the best soloist of the competition.

In 2010, when he entered the Bern University of the Arts, Gilles changed his instrument and devoted himself exclusively to the euphonium. During his studies, he worked with Thomas Rüedi, a nationally and internationally renowned soloist.

In 2012, with this instrument, he won the Professional Euphonium Solo category at the major international competition of the International Tuba and Euphonium Conference (ITEC) at the Brucknerhaus in Linz, Austria. In 2013, he obtained a Bachelor of Arts in Classical Music at the Bern University of the Arts. In 2014, he won first prize at the International Jeju Brass Competition in South Korea. Gilles Rocha performs regularly as a soloist in Switzerland (Kultur und Kongresszentrum in Lucerne, Auditorium Stravinsky in Montreux) and abroad (International Convention Centre in Ghent in Belgium, Brucknerhaus in Linz in Austria, etc.).

In 2015, Gilles Rocha obtained a Master of Arts in Music Pedagogy at the Bern University of the Arts with excellent honours and congratulations from the jury. He is currently pursuing his musical studies for the Master of Arts in Music Performance in orchestral conducting at the Bern University of the Arts with Ludwig Wicky, Rolf Schumacher, Florian Ziemen and Corsin Tuor. He took various master classes with brass personalities including Steven Mead, Jan van der Roost, Henrie Adams and Rex Martin.