Gustavo Rebelo was born in 2001 and began his musical studies at the age of 8 at the Calouste Gulbenkian Music Conservatory in Aveiro. He currently studies under Prof. William Coleman at the prestigious Mozarteum University Salzburg in Austria. His studies are also frequently guided by Prof. Ana Bela Chaves.
Since 2022, he has been a scholarship recipient of the "Yehudi Menuhin Live Music Now" foundation in Salzburg.

Gustavo has participated in various national and international music competitions, receiving distinctions such as 1st prize at the "Golden Classical Music Awards" (USA), along with an invitation to perform at Weill Recital Hall, 1st prize at the "Paços’ Premium" Competition (Portugal), 2nd prize at the Vigo International String Competition (Spain), and 2nd prize at the Verão Clássico Festival, among others.
Throughout his academic career, he has participated in several masterclasses and courses led by professors such as Miguel da Silva, Francien Schatborn, Tatjana Masurenko, Maté Szucs, Leo De Neve, Gérard Caussé, Hariolf Schlichtig, Kim Kashkashian, Thomas Riebl, William Coleman, Lars Anders Tomter, Nobuko Imai, Hartmut Rohde, Wilfried Strehle, and Ana Bela Chaves.

In the field of chamber music, his studies received significant artistic guidance from pedagogues and musicians such as Ana Bela Chaves, William Coleman, Lars Anders Tomter, Cibrán Sierra Vázquez, Oliver Wille, and Rainer Schmidt, having performed in concerts with the Agon Ensemble (Italy) and the Juventus Ensemble (Portugal), among others.

Throughout his studies, he has collaborated with various youth and professional orchestras, such as the München Bach-Orchester, the Munich Chamber Orchestra (Münchener Kammerorchester), the Bayerisches Kammerorchester Bad Brückenau, the Kammerphilharmonie Landshut, and the Philharmonie Salzburg.