There are two ways to onboard GCP usage accounts: Project and Organization.
Project
1. GCP Project UI Onboarding
[UI] GCP Project Manual Onboarding
2. GCP Project Automated Onboarding
[Automation] GCP Project Onboarding
Connect a Project (Partner)
GCP Connect Project Onboarding Partner
Organization
1. GCP Organization UI Onboarding
[UI] GCP Organization Manual Onboarding
2. GCP Organization Automated Onboarding
[Automation] GCP Organization Manual Onboarding
Connect an Organization (Partner)
GCP Connect Organization Onboarding Partner