[2] After his ordination as deacon in 1973, Gulick served as assistant rector of Trinity Church in Towson, Maryland, where he was ordained as a priest the following year.
After two decades of pastoral experience, Gulick was called to become bishop of the Episcopal Diocese of Kentucky, which then had 34 congregations.
On the national level, he served two terms on the Standing Committee on Ecumenical and Inter Religious Relations, co-chaired the Anglican Roman Catholic Dialog USA beginning in 1997, and served as one of the Episcopal Church's representatives on the Consultation on Church Union 1995–2000.
In 2001, Archbishop George Carey appointed him to serve on the International Anglican Roman Catholic Commission on Unity and Mission.
[2] In late 2008, Gulick agreed to assist part-time at the Episcopal Diocese of Fort Worth, whose bishop Jack Iker and many parishes had announced they would split from the Episcopal Church and join the Inaugural Provincial Assembly for the Anglican Church in North America.