Gradinja is one of many persons (alongside Branislav, Gojislav, Georgije and Grubeša among others) mentioned only in the Chronicle of the Priest of Duklja (CPD), not found in Byzantine sources as the other Serbian rulers and royalty.
[3] Around 1125, Gradinja, the rival of Đorđe, married himself in Raška (Grand Principality of Serbia), with the "intent of returning the rule", according to Mavro Orbini.
According to the CPD, Gradinja was gentle, tame, compassionate and a protector of the widows and the poor.
The power and territorial extent of Duklja was, in the time of his reign, greatly decreased.
Gradinja was according to Gavro Škrivanić buried in the Church of Saints Sergius and Bacchus in Bojana.