The Mexican baritone has sung over 60 different operatic parts in more than 80 productions in opera houses in Europe. He made a name for himself with the most important roles of the lyric baritone Fach covering most Mozart, Rossini and Donizetti roles, as well as many French ones. 

During the course of almost 20 years on stage, Gerardo has moved into a more dramatic repertoire with Kavalier and Heldenbaritone roles like Faninal in Der Rosenkavalier, Wolfram in Tannhäuser, Posa in Don Carlo, Giorgio Germont in La traviata, Conte di Luna in Il trovatore, Alfio in Cavaleria Rusticana, Doge in I due Foscari and Escamillo in Bizet’s Carmen.

In 2005, he made his debut at Ópera de Bellas Artes in Mexico City as Mercutio in Gounods Roméo et Juliette alongside Rolando Villazón and Anna Netrebko. In 2009 he starred as Schaunard in La Bohème im Hochhaus, a coproduction of ARTE TV and Swiss Television SF1 (available on DVD). In 2019 he sang the solos in Carmina Burana at Auditorio Nacional  in Mexico City for an audience of 20,000 people.