What is ".gabriel"

.Gabriel (pronounced "dot Gabriel") is an opera in two acts (to be performed continuously) written by American composer Robert J. Bradshaw. The libretto, also by Bradshaw, was inspired by the composer's online experiences with social networking websites, instant messaging, chat rooms and email correspondence. The opera was commissioned by the Australian Trumpet Guild for performance at the 35th Annual Conference of the International Trumpet Guild, 2010, Sydney, Australia. Also in 2010, the composition was awarded an American Music Center Composer Assistance Program Grant and was named winner of a 2009 Boston Metro Opera Mainstage Award.