Single Load Balancer on GCP

I have an installation of Rancher using a single node on GKE.
When I create a new Ingress in Rancher, it creates a new Load Balancer on Google Cloud side with a few rules. But, for every project, I need only one rule with * => Kubernetes nodes with only one LB on GKE.
Is it possible to configure Rancher in order to avoid the creation of new LB for each ingress addition ? Do I have another choice to reduce costs ?
Thanks in advance.