He can also discuss the history and development of acting theory and the challenges of performing Shakespeare.Gero has appeared on stage in New York, in regional theater, including the Goodman Theater in Chicago, Center Stage in Baltimore and Roundhouse Theater, Studio Theater, the Olney Theater and the Theater of the First Amendment in Washington, D.C. He has also appeared on film and television. He is a member of Actor's Equity and served on the National Committee for Standards in the Arts.