I am looking for Workday GMS Tenant access?

To modify or to establish business process for Global Modern Services you need to enable access by registering and generating the Client ID and Tenant ID to perform a task.

Then go to Actions – Business Process – Edit etc…

Customers are typically provisioned 4 tenants during deployment GMS tenant (demo data), Prototype tenant, Full dataload tenant, Testing tenant, Gold tenant.

GMS (Global Modern Services Tenant)

A services tenant with fictitious test data for Workday implementation partners to create demos, test upgrades, and try configurations. The GMS tenant gives you an opportunity to see configured features and custom reports using fictitious organizations and workers. The term deployment tenant refers to the Implementation tenants used to implement the Workday solution, such as for loading employees, configuring features, testing, and building integration. The term deployment tenant does not refer to a customer's Production, Sandbox, or Sandbox Preview tenants.

Integrate Workday

A Workday tenant is an instance of the Workday software, including data that exists independently of other tenants. There are many types of deployment and production tenants, each intended for a specific use. Complete this module to achieve a better understanding of both deployment and production tenants, and how to best manage them throughout the deployment lifecycle.

Tenant is a unique environment that holds different data set maintained by Workday. To my knowledge, the term Tenant was coined based on the Owner – Tenant, Example if you are renting a property from a land lord, then you are called as Tenant and the person who rents it out is the Owner. Here, Workday is allowing its customers to use the product in the cloud space, in-turn Workday charges its customers at the agreed frequency.