Nikola Živković was born on 25 November 1839 in the Banija village of Meminska, near Kostajnica, at the time in the Croatian Military Frontier, to father Grigorije, a theologian and archpriest, and mother Jelica.
He was ordained deacon on 8 September 1861, and in the rank of presbyter on 26 October of the same year by Metropolitan Petar Jovanović and appointed chaplain to his father in Dubica, followed by Crkveni Bok.
At the invitation of the metropolitan of the Dabar-Bosna, Grigorije moved to Sarajevo on 1 January 1897 as a member of the Consistory and was elevated to the rank of archimandrite.
As a long-time church-educator, Bishop Gregorije wrote: "History of the Christian Church" [3] and "Liturgy" (the books came out in two editions, printed by Matica srpska), which were used as textbooks in grammar schools[4] in Rakovac, Novi Sad and Sremski Karlovci, as well as in Serbian Orthodox Teacher's Academies.
Finally, he prepared and published the "Collection of Orders of the Metropolitan Administration of the Serbian Orthodox Diocese of Zvornik and Tuzla."