Gaby Alter is the recipient of a Jonathan Larson grant, an ASCAP Plus Award in musical theater, Best Score awards from the San Diego and San Francisco Theater Critics' Circles, , and an ASCAP Composer's Spotlight for his film work.  He has written Off-Broadway musicals, songs for Disney, PBS and MTV, and film scores that  have premiered at South by Southwest and the LA Film Festival. His musicals have been performed on three continents and continue to be produced regularly throughout the United States.  He performs and records his own songs as Yes Gabriel.  

Gaby's musical NOBODY LOVES YOU, written with Tony award winner Itamar Moses, premiered Off-Broadway at Second Stage Theater, where it was both a New York Times and Timeout New York Critics' Pick. Gaby and Itamar also wrote the song 'The Frigate That Flies' for the Disney animated feature Tinkerbell and the Pirate Fairy, sung by Tom Hiddleston (Loki in The Avengers.) Other musicals include BAND GEEKS, which premiered at Goodspeed Musicals, is published by Music Theatre International and features the hit audition song 'Lost In The Brass'; and songs for STARS OF DAVID (Daryl Roth Productions) alongside Broadway writers Jeanine Tesori, Marvin Hamlisch, Tom Kitt, Duncan Sheik and Steven Sater. Gaby has written songs for PBS Kids TV, the original theme for the NPR show Backstory, music for MTV's Teen Mom and Negin Farsad's podcast Fake The Nation. He scored the film 3rd Street Blackout (MarVista) starring Janeane Garofalo and John Hodgman, and both scored and starred in the documentary Nerdcore Rising (SXSW Film Festival). Gaby co-writes songs with nerdcore rapper MC Frontalot which have over 2 million views on YouTube and over 4 million streams on Spotify.

He is currently working on a commission, RADIO 930, about an East German pirate radio station, with Josh Billig, and developing THIS SHOW IS MONEY at The Civilians' R&D Group with Crystal Skillman, which investigates our personal and societal relationships with money.