How to use Gateway API with Kong on GKE?

Goal

I'm trying to use the Kubernetes Gateway API with Kong deployed on Google Kubernetes Engine (GKE).
I'd like to have some sort of guide or a set of steps to properly setup and use the Gateway API in our GKE cluster, in order to be able to create a HTTPRoute and make Kong handle the related traffic.

Setup

We're deploying Kong through an Helm chart (kong/ingress dependency). Here's the Chart.yaml:

[...]dependencies:  - name: ingress    alias: kong-ingress    version: 0.12.0    repository: https://charts.konghq.com

Here's the values.yaml:

kong-ingress:  controller:    enabled: true  gateway:    enabled: true    proxy:      loadBalancerIP: "X.X.X.X" # External static IP from GKE    certificates:      enabled: true      issuer: "kong-api-gateway" # We're also creating an Issuer based on letsencrypt      proxy:        enabled: true        commonName: "our.hostname.com"      admin:        enabled: true        commonName: "our.hostname.com"        issuer: "kong-api-gateway"      portal:        enabled: false      cluster:        enabled: false

Test

I've been able to deploy the Kong echo service:

# DeploymentapiVersion: apps/v1kind: Deploymentmetadata:  labels:    app: echo  name: echospec:  replicas: 1  selector:    matchLabels:      app: echo  strategy: {}  template:    metadata:      labels:        app: echo    spec:      containers:        - image: kong/go-echo:latest          name: echo          ports:            - containerPort: 1025            - containerPort: 1026            - containerPort: 1027          env:            - name: NODE_NAME              valueFrom:                fieldRef:                  fieldPath: spec.nodeName            - name: POD_NAME              valueFrom:                fieldRef:                  fieldPath: metadata.name            - name: POD_NAMESPACE              valueFrom:                fieldRef:                  fieldPath: metadata.namespace            - name: POD_IP              valueFrom:                fieldRef:                  fieldPath: status.podIP          resources: {}---# ServiceapiVersion: v1kind: Servicemetadata:  labels:    app: echo  name: echospec:  ports:    - port: 1025      name: tcp      protocol: TCP      targetPort: 1025    - port: 1026      name: udp      protocol: TCP      targetPort: 1026    - port: 1027      name: http      protocol: TCP      targetPort: 1027  selector:    app: echo

And expose it using an Ingress resource:

apiVersion: networking.k8s.io/v1kind: Ingressmetadata:  name: echo  namespace: kong-api-gateway  annotations:    konghq.com/strip-path: 'true'spec:  ingressClassName: kong  rules:  - http:      paths:      - path: /echo        pathType: ImplementationSpecific        backend:          service:            name: echo            port:              number: 1027    host: 'our.hostname.com'

Therefore, by sending a GET request to https://our.hostname.com/echo I get a response and the traffic is handled correctly by the Kong gateway:

$ curl -i -k -s https://our.hostname.com/echoHTTP/1.1 200 OKContent-Type: text/plain; charset=utf-8Content-Length: 183Connection: keep-aliveDate: Tue, 05 Mar 2024 09:28:42 GMTX-Kong-Upstream-Latency: 1X-Kong-Proxy-Latency: 0Via: kong/3.6.0X-Kong-Request-Id: 37cdd90730c6595e2364f736e74a6146Welcome, you are connected to node gke-test-europe-west1-default-pool-d1b60670-qqbd.Running on Pod echo-74c66b778-44j9l.In namespace kong-api-gateway.With IP address X.X.X.X.

Problem

The Kong Ingress Controller documentation for the GKE deployment (docs.konghq.com) doesn't provide any information about the Gateway API.

What would be the steps I need to perform to utilize them?

Here's the Gateway api-resources installed in our cluster:

$ kubectl api-resources | { head -1; grep gateway; }NAME                 SHORTNAMES   APIVERSION                          NAMESPACED   KINDgatewayclasses       gc           gateway.networking.k8s.io/v1beta1   false        GatewayClassgateways             gtw          gateway.networking.k8s.io/v1beta1   true         Gatewayhttproutes                        gateway.networking.k8s.io/v1beta1   true         HTTPRoutereferencegrants      refgrant     gateway.networking.k8s.io/v1beta1   true         ReferenceGrantgcpgatewaypolicies                networking.gke.io/v1                true         GCPGatewayPolicy

HTTPRoute example:

# Route /echoapiVersion: gateway.networking.k8s.io/v1beta1kind: HTTPRoutemetadata:  name: echo  annotations:    konghq.com/strip-path: 'true'spec:  parentRefs:  # Gateway reference  - name: kong  rules:  - matches:    - path:        type: PathPrefix        value: /echo    backendRefs:    - name: echo      kind: Service      port: 1027