First of all. thanks for your reply.
I had installed bitnami via GCP > Deployment Manager. I realized few Compute VM settings (storage access) are not abled before completing the installation.
Now the Database is running in production & wanted to stop (secondary replicaset) over no usage time (late night). Update the computeVM settings & enable the VM & sudo bitnami service start. Is that good enough ?
Also i check /opt/bitnami/support-tool is not installed in my machine. Thanks for the link. Can i go ahead and install ?