Update guide to add steps to deploy healthcheck policy for gke

Author: rlakhtakia

site-src/guides/index.md

@@ -80,6 +80,21 @@ A cluster with:
    kubectl apply -f https://github.com/kubernetes-sigs/gateway-api-inference-extension/releases/latest/download/manifests.yaml
    ```
 
+### Deploy the InferencePool and Endpoint Picker Extension
+
+   Install an InferencePool named `vllm-llama3-8b-instruct` that selects from endpoints with label app: vllm-llama3-8b-instruct and listening on port 8000, you can run the following command:
+
+   ```bash
+   export GATEWAY_PROVIDER=none #  See [README](https://github.com/kubernetes-sigs/gateway-api-inference-extension/blob/main/config/charts/inferencepool/README.md#configuration) for valid configurations
+   helm install vllm-llama3-8b-instruct \
+   --set inferencePool.modelServers.matchLabels.app=vllm-llama3-8b-instruct \
+   --set provider.name=$GATEWAY_PROVIDER \
+   --version v0.3.0 \
+   oci://registry.k8s.io/gateway-api-inference-extension/charts/inferencepool
+   ```
+
+   The Helm install automatically installs the endpoint-picker, inferencepool along with provider specific resources.
+
 ### Deploy an Inference Gateway
 
    Choose one of the following options to deploy an Inference Gateway.
@@ -113,6 +128,18 @@ A cluster with:
          ```bash
          kubectl get httproute llm-route -o yaml
          ```
+      
+      5. Deploy the HealthCheckPolicy
+
+         ```bash
+         kubectl apply -f https://github.com/kubernetes-sigs/gateway-api-inference-extension/raw/main/config/manifests/gateway/gke/healthcheck.yaml
+         ```   
+      
+      6. Confirm that the HealthCheckPolicy status conditions include `Attached=True`:
+
+         ```bash
+         kubectl get healthcheckpolicy health-check-policy -o yaml
+         ```
 
 === "Istio"
 
@@ -267,22 +294,6 @@ A cluster with:
          kubectl get httproute llm-route -o yaml
          ```
 
-
-### Deploy the InferencePool and Endpoint Picker Extension
-
-   Install an InferencePool named `vllm-llama3-8b-instruct` that selects from endpoints with label app: vllm-llama3-8b-instruct and listening on port 8000, you can run the following command:
-
-   ```bash
-   export GATEWAY_PROVIDER=none #  See [README](https://github.com/kubernetes-sigs/gateway-api-inference-extension/blob/main/config/charts/inferencepool/README.md#configuration) for valid configurations
-   helm install vllm-llama3-8b-instruct \
-   --set inferencePool.modelServers.matchLabels.app=vllm-llama3-8b-instruct \
-   --set provider.name=$GATEWAY_PROVIDER \
-   --version v0.3.0 \
-   oci://registry.k8s.io/gateway-api-inference-extension/charts/inferencepool
-   ```
-
-   The Helm install automatically installs the endpoint-picker, inferencepool along with provider specific resources.
-
 ### Deploy InferenceObjective (Optional)
 
    Deploy the sample InferenceObjective which allows you to specify priority of requests.