Sources and the Ochrid Inscription
The fullest of the brief notices derive from the synaxarion tradition and from the Prologue of Ohrid, which describe Gregory as a devout teacher and pastor of Christ's flock who died in 1012. The detail most often repeated is the epigraphic one: an inscription in the Church of St. Sophia in Ochrid names him "Gregory the Wise."
The variation in his title across sources — "of Ochrid," "bishop of Ochrid," "bishop of Moesia," and the venerable/monastic rank carried in this database — reflects the thinness of the surviving evidence rather than competing biographies, and the obscurity of the figure has been noted for clergy and source review.