I am not sure what do you mean when you said “I am able to access the elastic service of GCP project by using kubctl port forwarding in my local system”, but if you want to have access to your GCP resources from your local, it is necessary to install in your local the Cloud SDK. Once you have installed it, you need to install the kubctl as is described here.
Having installed that, and once you have been authenticated correctly to your project, you will have access to your GCP resources (taking into account that you will have access to the same resources that you have access using the console).
solved How to access kubernet service from local machine without Port forwarding?