Gios was House Vyronii's Grand Master during the Horus Heresy[1]. He succeeded his father, Jahk, who was slain in the Heresy's Battle for Felweather Keep.[2]
Sources
- 1: The Horus Heresy Book Four - Conquest, pgs. 114–117
- 2: Warhammer Community: Exemplary Battles of the Horus Heresy – Corrupt Your Knights and Quest for Profane Power (Posted on 12/09/2023) - The Battle for Felweather Keep, pgs. 2-5 (Last accessed on 12/09/2023)