According to Garcia's companion, Marcelo de Ribandeneira, who became a historian and is considered as the most authentic source on his life, Garcia once told him that his mother was from Bassein and his father a Portuguese soldier.
Menurut pengikut Garcia, Marcelo de Ribandeneira, yang menjadi seorang sejarawan dan dianggap sebagai sumber paling otentik dari kehidupan St. Gonsalo Garcia, santo tersebut suatu saat mengatakan bahwa ibunya berasal dari Bassein dan ayahnya seorang prajurit Portugis.