Google Drive
Google Drive is a personal connector: you link your own Google account, and your Drive files become a source you can browse and use directly in your workspace, alongside My space and any other sources you've connected.
For now, Google Drive isn't offered as a self-serve connector to regular workspace members. It's restricted to Ordalie's internal administrators, so it won't appear in your Connect a source list. If you need Google Drive access, get in touch with support and they'll let you know what's possible for your account.
When it's available to you, you connect it the same way as any other personal source — from the Connect a source entry in the workspace left sidebar, or from Settings → Integrations. Google Drive sits under Personal Workspace (or Personal Integrations in Settings), and you sign in with your own Google account.
In the meantime, you can still bring your files in by importing them by hand, or connect another personal source you own, such as OneDrive, Dropbox, or Box. SharePoint can be connected as a personal source too, or set up organization-wide by an administrator.