In the 1994-1995 season, Gruber sang the role of Elsa in Wagner's "Lohengrin" with Seattle Opera and the role of Amelia in Verdi's "Simon Boccanegra" at the Metropolitan Opera.
In the 1994-1995 season, Gruber sang the role of Elsa in Wagner's "Lohengrin" with Seattle Opera. In 1994, Gruber sang the title role in Verdi's "Aida" at the Metropolitan Opera.