Gregory was an Exarch of Ravenna (664-677).

Gregory succeeded Theodore I Calliopas

Theodore I Calliopas

Theodore Calliopas was an Exarch of Ravenna twice .Nothing is known of Theodore's first term, except that he succeeded Isaac 643, and was replaced by Plato c. 645....

 as Exarch. His tenure is mostly known for his support of the Archbishop

Archbishop

An archbishop is a bishop of higher rank, but not of higher sacramental order above that of the three orders of deacon, priest , and bishop...

 of Ravenna

Ravenna

Ravenna is the capital city of the Province of Ravenna in the Emilia-Romagna region of Italy and the second largest comune in Italy by land area, although, at , it is little more than half the size of the largest comune, Rome...

 in the latter's struggles with the papacy over the independence of the sea. Also during his administration, the Byzantine Emperor Constans II invaded southern Italy

Italy

Italy , officially the Italian Republic languages]] under the European Charter for Regional or Minority Languages. In each of these, Italy's official name is as follows:;;;;;;;;), is a unitary parliamentary republic in South-Central Europe. To the north it borders France, Switzerland, Austria and...

 in an unsuccessful attempt to destroy the power of the Lombards

Lombards

The Lombards , also referred to as Longobards, were a Germanic tribe of Scandinavian origin, who from 568 to 774 ruled a Kingdom in Italy...

. He was succeeded in 677 by Theodore II

Theodore II (exarch)

Theodore II was Exarch of Ravenna .Theodore succeeded Gregory in 677. He is recorded as confirming the election of Conon as Pope on 21 October 686....

.