Gabriela Mantellato Dias (born 28 October 1991) is a water polo player of Brazil. She competed at the 2011 World Aquatics Championships, 2015 Pan American Games, and won a bronze medal at the 2011 Pan American Games.
She was part of the Brazilian team at the 2015 World Aquatics Championships. She won bronze medals at the 2011 and 2015 Pan American Games. She participated at the 2016 Summer Olympics.