Ed Joyce and captain Michael Yardy - back after missing his team's first match against New South Wales because of an illness - briefly held the innings together.
Galway could have been even further ahead at that stage as Barry Monaghan had made a desperate clearance off his goal line after a Nicky Joyce shot evaded Michael Boyle.
Joyce Sanderson, chair of St Michael's steering committee, pledged St Michael's would be "open to everyone" and said she was confident there was a lot of interest in the new school.