Also, Team!! We need to know if creating a new GCP project is possible without specifying any project_ID in the pulumi script? Our purpose is to have a console-free IAC which is possible through pulumi but we have to create a GCP project manually first because we need a project ID as input for creating a new GCP project.

Just to clarify what you mean by projectId - a projectId is just a unique identifier for your new project - pulumi doesn't have a dependency on an already created project