Gogs are no fun. They don't make good friends, they don't make interesting conversation, and they don't play fair. They're programmed to maintain a certain distance when they attack you and move sideways, firing at you with their ranged Fire attacks. In here this means that they're usually behind a wall and you'll have to get close in order to hit them. Then they explode when they die, dealing you some Damage as a parting gift.
Well, you don't have to kill any Gogs to satisfy the Quest, but you have to get past several, so...