DuckCorp Dico

Found one definition

1.                 From English - German Ding/FreeDict dictionary ver. 1.9-fd1:
                   
   
   
                   
                     
   G double flat /dʒˈiː dˈʌbəl flˈat/
   G <neut>, Gis <neut>, Ges <neut>, Gisis <neut>, Geses <neut> [mus.]
      Synonyms: G, G sharp, G flat, G double sharp