title: Add custom routes to GKE pods
body: <p>I have a system where pods attempt to access a specific subnet via a gateway VM.</p>
  <p>The topology looks something like this:</p>
  <p>Pod A (10.10.0.2) -&gt; Gateway VM (10.10.0.1 - 11.11.0.1) -&gt; VM B (11.11.0.2)</p>
  <p>Basically Pod A should be able to ping and interact with VM B. The cloud router allows VMs in my network to communicate but not specific pods unless the &quot;hostNetwork: true&quot; is specified (which I do not want to specify).</p>
  <p>My question is how can I either force the pod to use the cloud router specified routes or add a custom route to the pod in a VPC-native cluster.</p>
  <p>Thanks in advance!</p>