Google previously attempted to pacify users with a free Google Workspace feature, but that excluded email support for domain names that didn’t end with @gmail.com. With the revival of G Suite for longtime users, they will still be able to access Gmail using their own domain names.

To do this, head to your account’s Admin Console and choose “Personal use: stay on no-cost Legacy G Suite.”

With this option, though, you’ll have to agree that the account will not be used for business purposes.

https://designtaxi.com/news/418719/Google-Makes-G-Suite-Free-Again-For-Legacy-Users-But-You-ll-Have-To-Opt-In/