Following his priestly
ordination in 1987 he became a member of the staff of the Ariënskovikt
seminary. he was also appointed as parish priest of the Cathedral of St. Catharina in Utrecht. From 1992 to 1999 he was rector of the Ariënskonvikt. In 1999 he was appointed to dean of
Salland, which was merged with the deanery of Veluwe-Flevoland to form the deanery of IJsellanden. As such he was also a member of the bishop's council.
Pope John Paul II appointed Gerard de Korte as auxiliary bishop of the Archdiocese of Utrecht on 11 April 2001 and as
titular bishop of
Caesarea in Mauritania.
Cardinal Simonis also appointed him as diocesan
vicar. His primary duty was in the fields of
catechesis and
liturgy. Within the conference of bishops he was responsible for Church and Society. On 18 June 2008,
Pope Benedict XVI appointed him bishop of the diocese of Groningen-Leeuwarden, succeeding
Msgr. Eijk who had been made
Archbishop of Utrecht earlier that year. De Korte was enthroned on 13 September 2008. In March 2016 was announced that De Korte will succeed
Bishop Hurkmans as bishop of the Diocese of 's-Hertogenbosch, the most populous diocese in the Netherlands. Coat of arms of Gerard Johannes Nicolaus de Korte.svg| Coat of arms of Gerard de Korte.svg| Coat of arms of Gerard de Korte (auxiliary).svg|as auxiliary bishop ==Ordinations==