1. Tap Settings > Mail > Accounts > Add account > Email (for older iOS versions, Tap Settings > Mail, Contacts, and Calendars > Accounts > Add account > Email).
2. Tap Google:
3. Enter your full email address and password, then tap Sign In:
4. Tap Allow:
5. If you have 2-Step Verification turned on, please continue. Otherwise, if you've entered your information correctly, you will be shown the following screen. Select what you want to sync and press Save:
You have now configured your G Suite email account to your iOS device.
6. If you have 2-Step Verification turned on - after you have entered your password you will be prompted to enter your 6-digit verification code:
7. Switch to your authenticator app, and note the 6-digit verification code:
8. Switch back to the previous application, enter the token, then tap next:
If you've entered your information correctly, you will be shown the following screen. Select what you want to sync and press Save: