In 1926, Fr. James E. Carey of Sacred Heart Parish in Portland founded Catholic children's camps throughout the area including St. Gregory's for boys on Crystal Lake in Gray. Under the direction of the chaplain at St. Gregory's, Mass was celebrated in the recreation hall for the campers and local people who wished to attend during the summer months.

Part Two: The Road Towards a Parish

As summer visitors increased, there was a drive in 1958 to build a chapel on the grounds. Father Knox was the campground chaplain at the time. The Catholic Holy Name Society of Portland and many other interested groups and individuals helped to make the drive a success. The chapel was built and named in honor of St. Gregory the Great. It was formally dedicated and blessed on August 2, 1959, and then became a Mission of Sacred Heart of Yarmouth.

Part Three: Renovations

With the increased number of families in the area, the people desired a church that would be open all year. With the encouragement of the Most Reverent Daniel J. Feeney, the summer chapel was winterized in the fall of 1964.

On April 15, 1967,  St. Gregory's was established as a parish with its own resident Pastor. Rev. James Knox who served the families of Gray, New Gloucester and West Cumberland. There were 200 registered Catholic families at that time. They had no rectory then and Father Knox lived in a campground cabin for part of the winter with no plumbing and only a fireplace for heat. The campground had, at one time, 448 campers (boys) and 39 staff members.

The rectory was built in 1968 by a Lewiston contractor but mostly by parishioners. The parish hall was completed in 1970. In 2011, St. Gregory Church joined the Parish of the Holy Eucharist.

Today St. Gregory is an active church, working in partnership with Holy Martyrs, St. Jude and Sacred Heart as the Parish of the Holy Eucharist to proclaim and celebrate our faith