Hi Adryenn, you can sync any gmail workspace you have access to, but you can only have 1 connected email per user. If you are clicking the connect button, it will typically give you an option of which gmail account you would like to connect with.
E.g. for me it shows these options:

If the gmail user you want to connect with doesn't show here, you'd need to click 'Use another account'. We've also recently released our SMTP connection, if your domain offers that (although if it's a gmail workspace I would expect the former option is probably best)

Let me know if that answers your question!