Does your game have a particular, singular Gangrel protagonist? If it's a personal story of why said Gangrel (and their sire/coterie) left the Cam, you can frame it in any way you want. Or if it's a story said from the perspective of a single Gangrel, they could have a very different idea on what actually happened to what is "canon". In V5 clans are not a singular entities, members have different opinions, both political and historical, and approach Kindred history individually. Not all Tremere will even know about Salubri/Saulot, not all Salubri will know about Tremere, not all Brujah will align with the Anarchs, etc.