istio.io/content/en/boilerplates/gateway-api-install-crds.md

Note that the Kubernetes Gateway API CRDs do not come installed by default on most Kubernetes clusters, so make sure they are installed before using the Gateway API:

{{< text syntax=bash snip_id=install_crds >}} $ kubectl get crd gateways.gateway.networking.k8s.io &> /dev/null ||
{ kubectl apply -f https://github.com/kubernetes-sigs/gateway-api/releases/download/{{< k8s_gateway_api_version >}}/standard-install.yaml; } {{< /text >}}