My name isXXXXX will assist you.I am sorry to hear that you are having this issue.
The Gmail app is the recommended way to instantly receive your mail on your iPhone and iPad. The app brings the best of Gmail with real-time notifications, multiple account support and search across your entire inbox.>PLEASE CLICK HERE,
You can also add the account through the iPad settings menu>
Follow these steps to add an email account on your iOS device.
If you don't see your email provider listed, tap Other > Add Mail Account.
Follow the onscreen steps and provide the required information to configure your account.
To add more email accounts, repeat the above steps.