In 1921 Vanelli portrayed Hermann in Alfredo Catalani's Loreley at the Teatro Comunale in Forli, and in 1922 he sang Sharpless in Puccini's Madama Butterfly at the Politeama Verdi in Cremona. In 1923 he performed the role of Tonio in Ruggero Leoncavallo's Pagliacci at the Teatro all'Aperto in L'Aquila. In 1924 he toured Egypt where he appeared at the Cairo Opera House and at the Teatro Alhambra of Alessandria in ‘’Lucia di Lammermoor’’ as Lord Enrico Ashton. That same year he toured to Brazil. In 1925 he performed at the Teatro Real in Madrid and appeared as Marcello in Puccini's La bohème at the Teatro Principal in Palma di Majorca.
In 1926 Vanelli made his debut at the Teatro Costanzi in Rome as Escamillo in Carmen with Maria Gay in the title role. That same year he made his debut at La Scala in Milan as Ping in Puccini's Turandot.[3] He remained committed to La Scala as a resident artist for the next 20 years. From 1926-1928 he made numerous appearances at the Teatro Colón in Buenos Aires, including starring roles in the world premieres of Rafael Peacan del Sar's Chrysantheme (1927) and Raúl Espoile's Frenos (1928). Other operas he sang in Buenos Aires were Turandot, Ildebrando Pizzetti's Fra Gherardo, Felice Lattuada's "Le preziose ridicole", and Ottorino Respighi's La campana sommersa.
Belotti, Bortolo (1940). Storia di Bergamo e dei Bergamaschi. Ceschina.
Kutsch, K. J.; Riemens, Leo (1969). "Vanelli, Gino". A Concise Biographical Dictionary of Singers: from the Beginning of Recorded Sound to the Present. Chilton Company.