Istio Ingress Gateway not working in Anthos

Question

I created a cluster in GKE - (Google Kubernetes Engine) Folowed the instructions here https://cloud.google.com/service-mesh/docs/quickstart-asm but used my own deployment files. I deployed these service and gateway file.

Partial Service

---
apiVersion: v1
kind: Service
metadata:
  name: node-microservice-service
spec:
  selector:
    app: node-microservice
  # type: LoadBalancer
  ports:
    - name: tcp-node
      protocol: TCP
      port: 8080
      targetPort: 8080
      # nodePort: 30000

---

Gateway

apiVersion: networking.istio.io/v1alpha3
kind: Gateway
metadata:
  name: backend-gateway
spec:
  selector:
    istio: ingressgateway # use Istio default gateway implementation
  servers:
    - port:
        number: 80
        name: http
        protocol: HTTP
      hosts:
        - "backend.com"
---
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: backend-ingress
spec:
  hosts:
    - "backend.com"
  gateways:
    - backend-gateway
  http:
    - match:
        - uri:
            prefix: "/node"
      route:
        - destination:
            port:
              number: 8080
            host: node-microservice-service
    - match:
        - uri:
            prefix: "/java"
      route:
        - destination:
            port:
              number: 8080
            host: java-microservice-service
    - match:
        - uri:
            prefix: "/golang"
      route:
        - destination:
            port:
              number: 8080
            host: golang-microservice-service
    - match:
        - uri:
            prefix: "/python"
      route:
        - destination:
            port:
              number: 8080
            host: python-microservice-service
    - route:
        - destination:
            port:
              number: 8080
            host: python-microservice-service

I am using the proper IP address and host together still unable to reach the microservices through the istio ingress gateway service.