During his 12-year tenure in Newark, Gerety created the Office of Pastoral Renewal and began a ministry to divorced Catholics. The Office of Pastoral Renewal evolved into RENEW International, an organization now based in Plainfield, New Jersey, that provides faith-sharing resources for small Christian Communities in the United States, Canada, Latin America, and South Africa. Gerety established the Archbishop's Annual Appeal in 1975, and supported the charismatic and ecumenical movements. He also established the Archbishop Gerety Fund for Ecclesiastical History to advance studies in ecclesiastical history, especially the history of Catholicism in the United States.