The F5 BIG-IP load balancer is not bundled with GKE on VMware, so you must get a licence and set up the load balancer separately from installing GKE on VMware.
You can configure GKE on VMware to be integrated with F5 BIG-IP in the
following sense: When a developer creates a Service of type LoadBalancer and
specifies a VIP for the service, GKE on VMware will automatically
configure the VIP on the load balancer.
You can also use F5 BIG-IP as a manually configured load balancer. In this case, GKE on VMware does not automatically configure Service VIPs.