Frères du Sacré-Cœur
Bishop Guertin (BG) is a college preparatory private Roman Catholic high school in Nashua, New Hampshire. Named for Bishop George Albert Guertin (1869-1931), it was founded by the Brothers of the Sacred Heart in 1963. The school is located off Exit 4 of the F. E. Everett Turnpike in Nashua, in the Roman Catholic Diocese of Manchester.