In 1999 Grex Vocalis was awarded Il Gran Premio Città di Arezzo as the overall best choir in that year's contest.
Over the years Grex Vocalis has commissioned and premiered works by several Norwegian composers, including Knut Nystedt, Trond Kverno and Arne Nordheim.
In 1994 the choir took part in the stage production of Arne Nordheim's monumental Draumkvedet, which with the Norwegian Broadcasting Radio Orchestra and soloists was performed 40 times.
In the acclaimed Gymnaslærer Pedersens beretning om den store politiske vekkelse som har hjemsøkt vårt land 2006 film based on Dag Solstad's acclaimed Gymnaslærer Pedersens beretning om den store politiske vekkelse som har hjemsøkt vårt land 1982 novel, songs from the acclaimed Frihetens faner på ny CD were used.
The conductor Carl Høgset held degrees in languages and musicology from the University of Oslo as well as in voice and choral conducting from the Norwegian State Academy of Music.