For a fix of Gmail unavailable error, it is advisable to sign out of the Gmail account for a while and then you should again sign in the account. If the issue still continues then in that case, it is advisable that the user gets connected with the certified Gmail experts as and when needed. Lines are open for help and support all the time. The technicians are available at the service of the users 24*7.

Contact No.:  +44-800-368-9067

Website: http://www.email-helpline-number.co.uk/gmail-customer-services.php