There are a few different ways you can access Google Console, depending on what you need to do.
If you're an administrator of a Google Group, you can access the group's Console by going to the Groups section of your Google Admin console. Click the group you want to access, then click the Groups icon at the top of the page. This will take you to the group's Console.
If you're a developer who needs to manage APIs or register new projects, you can access the Developer Console by going to the API Manager section of the Google Cloud Platform Console.
For other tasks, such as managing billing, you can go to the main Google Cloud Platform Console.