Gabel's most noted work was as narrator and host of the May 8, 1945, CBS Radio broadcast of Norman Corwin's epic dramatic poem On a Note of Triumph, a commemoration of the fall of the Nazi regime in Germany and the end of World War II in Europe. The broadcast was so popular that the CBS, NBC, Blue and Mutual networks broadcast a second live production of the program on May 13. The Columbia Masterworks record label subsequently published an album of the May 13 production. The production became the title focus of the Academy Award-winning short film A Note of Triumph: The Golden Age of Norman Corwin in 2005, the 60th anniversary year of the broadcast.