I understand that you have multiple Google Compute Engine instances in your GCP project, and you want to access them. You can do so by following the information provided in the documentation for Connecting to GCE Instances .
gcloud command that you should use to connect to an instance of GCE (let's call it
instancia1 ) is as follows:
gcloud compute ssh instancia1
You can run this command from the Cloud Shell, or from any other site where you have the Cloud SDK installed.
On the other hand, you can go directly to the "Compute Engine > Instances" tab in the Console, and use the
SSH button next to the GCE instance, which will open a new window with access to the instance via SSH.