The élite of Tao (Basil Bagratisdze, P'eris Jojikisdze, Abas and Grigol Bakurianisdze) regarded Georgia as 'our country' and strove for its spiritual, cultural and political prosperity.

[11] Taking into account all the evidence available on Pakourianos, the scholar Nina G. Garsoïan proposed that "the most likely explanation is that [the Pakourian family] belonged to the mixed Armeno-Iberian Chalcedonian aristocracy, which dwelt in the border district of Tayk/Tao.

As the Seljuk advance forced the Byzantines to evacuate the eastern Anatolian fortresses and the theme of Iberia, Gregory ceded control over Kars and Tao to King George II of Georgia in 1074.

[15] Afterwards he served under Michael VII Doukas (c.1071–78) and Nikephoros III Botaneiates (c.1078–81) in various responsible positions on both the eastern and the western frontiers of the empire.

He possessed numerous estates in various parts of the Byzantine Empire and was afforded a variety of privileges by the emperor, including exemption from certain taxes.

He together with his brother Abas (Apasios) made, in 1074, a significant donation to the Eastern Orthodox Holy Monastery of Iviron on Mount Athos and commissioned the regulations (typikon) for this foundation.