In the operatic pit, he conducts again at the Bavarian State Opera, leading Fidelio —including performances at the Munich Opera Festival— as well as Der Freischütz at the Hamburg State Opera, following his leadership of the production’s premiere run in the previous season. He also makes his debut at the Opéra National de Montpellier with a new production of Cavalleria rusticana and Pagliacci.
In summer 2025, he conducted Salome at the Baltic Opera Festival, followed by a tour with the Angelika Prokopp Summer Academy of the Vienna Philharmonic. In the 2024/25 season, he opened with a new production of Der Freischütz in Hamburg and made debuts with the Swedish Radio Symphony Orchestra, BBC Philharmonic, and the Essen Philharmonic. He returned to the Sinfonieorchester Bern, the Junge Philharmonie Brandenburg, and the Vienna State Opera with Salome. The season concluded with the world premiere of Elmar Lampson’s Wellen at the Theater Bremen.
In 2023, Gamzou founded the oneMusic Orchestra, which gave its debut at the Beethovenfest in Bonn. From 2017 to 2022, he served as General Music Director of Theater Bremen, where his productions included Lady Macbeth of the Mtsensk District, Die Fledermaus, Die tote Stadt, L’Étoile, Der Rosenkavalier, Jenůfa and Carmen, among many others.
As a guest conductor, Gamzou has appeared at the Hamburg State Opera (Carmen, Tosca, Die tote Stadt, Der Freischütz), the Bavarian State Opera (Il Segreto di Susanna, Schön ist die Welt, Die tote Stadt), the Vienna State Opera (Tosca, Die Fledermaus, Die tote Stadt, Salome), the Deutsche Oper Berlin (Tosca), the Hessian State Theater Wiesbaden (Turandot, Carmen, Die lustige Witwe), the Gothenburg Opera (Die schweigsame Frau), and the Aalto Theater Essen (Der Freischütz). He also conducted Marina Abramović’s The Seven Deaths of Maria Callas at the English National Opera, Opéra de Paris, Greek National Opera, Deutsche Oper Berlin, Teatro di San Carlo, and the Bavarian State Opera.