case gvk.GatewayClass:
		oldRes := &sigsk8siogatewayapiapisv1beta1.GatewayClass{
			ObjectMeta: origMeta,
			Spec:       *(orig.Spec.(*sigsk8siogatewayapiapisv1beta1.GatewayClassSpec)),
		}
		modRes := &sigsk8siogatewayapiapisv1beta1.GatewayClass{
			ObjectMeta: modMeta,
			Spec:       *(mod.Spec.(*sigsk8siogatewayapiapisv1beta1.GatewayClassSpec)),
		}