 He is the younger brother of the Tony Award-winning singer-actress Lea Salonga.Gerard began his musical education, taking piano lessons, at the age of 5.He joined his sister, the child prodigy theatrical singer Lea Salonga, singing duets in her first album, Small Voice (""Happiness""), as well as taking part in the 8th Metro Manila Popular Music Festival as interpreters for the song entry, "Musika, Lata, Sipol at La La La" by Tess Concepcion in 1985, which won second place.