Add IPv6 Support To Your Server-side GTM Load Balancer

UPDATED 20 March 2026 : Shortly after publishing this article, Google Cloud changed how Load Balancer frontend certificate management works. Instead of directly mapping a frontend to a certificate, GCP now wants you to use a certificate map . Luckily, creating one is (fairly) simple, and I&rsquo;ve updated the guide below to instruct how to do this. If you&rsquo;re running server-side Google Tag…