Gabriel Alejandro "Gaby" Deck (born February 8, 1995) is an Argentine professional basketball player for Real Madrid of the Spanish Liga ACB and the EuroLeague.

On July 19, 2018, Deck signed a three-year deal with Real Madrid of the Liga ACB and EuroLeague after he reached a buyout agreement with San Lorenzo.

[6] On April 29, Deck made his debut against the New Orleans Pelicans, scoring two points, grabbing two rebounds and dishing out two assists across 15 minutes in the Thunder's 109–95 loss.

With the junior national team of Argentina, Deck was the top scorer of the 2012 FIBA Under-17 World Cup, with an average of 21.5 points per game.

Deck also represented the senior men's Argentine national basketball team at the 2015 FIBA AmeriCup, in Mexico City, where he won a silver medal.