- From your Home screen, select "Settings"
- Select "Accounts & Passwords" and tap "Add Account" at the bottom. (Note that on older devices, this may show up as "Mail," in which case you'll need to select that, tap "accounts" and then "Add Account.")
- Select "Google"
- Enter your email address and tap "next"
- Enter your password and tap "next"
- Enable your desired services (Mail, Contacts, Calendars & Notes). Generally unless you have a specific reason not to, you'd enable all of them.
- Tap "Save"
Once you've finished setting up your G Suite account, assuming you have more than one account, it's a good time to review which account is set to be your default and update as desired. Here's more info on how to do that: http://bioniccat.freshdesk.com/solution/articles/3000073483-specifying-your-default-accounts-in-ios