Carey Gabay, a first deputy general counsel at the Empire State Development Corp., was shot in the head during a pre-dawn party celebrating the West Indian Day parade on Monday.
He was taken to Kings County Hospital.
Cuomo called the 43-year-old Harvard-educated lawyer “an outstanding public servant” who joined his administration in 2011.
Gabay was walking with his brother near the Brooklyn parade route at 3:40 a.m. when he was caught in the crossfire.
The shooting was one of several outbursts of violence in the neighborhoods surrounding the parade. A 24-year-old man was stabbed to death near Grand Army Plaza.
There have been no arrests in either incident.