Phase 1: Medusa's Head
The Gorgon is a multi-headed serpent-like creature. Initially, you'll face its central Medusa-like head. This head primarily uses a petrifying gaze. When you see its eyes glow, quickly turn Gabriel away from the Gorgon to avoid being turned to stone. If you are petrified, rapidly wiggle the left stick to break free before it attacks. It also has a biting attack that can be parried. Your goal is to damage this head until it recoils. Once it's stunned, grapple onto it and attack its exposed neck. Repeat this process until the head is destroyed. Use Shadow Magic to maximize damage during the grapple phase.
Phase 2: Serpent Heads
After destroying the central head, two smaller serpent heads will emerge. These heads are faster and more agile. They will spit venomous projectiles and perform quick lunging attacks. The petrifying gaze is still a threat, so continue to turn away when their eyes glow. Focus on one head at a time. Dodge their lunges and counter-attack. When one head is sufficiently damaged, it will become stunned. Grapple onto it and attack its neck. Be aware that while you're attacking one head, the other can still attack you. Use area-of-effect sub-weapons like Holy Water to damage both simultaneously if they are close. Once both serpent heads are destroyed, the Gorgon will be defeated. This fight requires good awareness of your surroundings and quick reflexes to avoid petrification.