Real world article
(written from a production point of view)
According a letter created for the Picard family album but not actually seen in Star Trek Generations, Gershwin was a theater on Broadway.
In the letter sent by Michelle from the Daystrom Institute, she mentioned that the last time she had heard from Jean-Luc Picard was when she working on a show at the Gershwin which never got past the previews.