As an architect, Gabriel designed a mixed use building for Fox and Fowle Architects in NYC. He also collaborated on the Hyatt at Gainey Ranch in Scottsdale, AZ, for Hornberger Worstell and the addition to the Reed Library, SUNY Fredonia, NY for Pasanella and Klein.

Gabriel is a Registered Architect in the State of NJ License No. 11916.

Gabriel was a recipient of the Oscar B. Cintas Prize for Architecture.