Gregory made a significant impact on the shape of Trinitarian theology among both Greek- and Latin-speaking theologians, and he is remembered as the "Trinitarian Theologian". Much of his theological work continues to influence modern theologians, especially in regard to the relationship among the three Persons of the Trinity. Along with two brothers, Basil the Great and Gregory of Nyssa, he is known as one of the Cappadocian Fathers.
Gregory is a saint in both Eastern and Western Christianity. In the Roman Catholic Church he is among the Doctors of the Church; in Eastern Orthodoxy he is revered as one of the Three Holy Hierarchs, along with Basil the Great and John Chrysostom.