Gate Gargants function as a living gatehouse, stationed as the forbidding core of a Castelite formation. These massive brutes rebuff enemy charges with bone-smashing sweeps of their warmauls while their tower-mounted handlers open up with multi-barrelled cannons. When the decision is made for the Sigmarites to go on the offensive, the Gate Gargants part their massive shields, signalling an all-out assault.