How to configure a custom domain name in GAE?
Steps: Visit Developers Console. In your project: Compute -> App Engine -> Settings. On the tab labelled CUSTOM DOMAINS, you can verify your domain and assign it and/or its subdomains to your GAE project. Add the DNS settings provided by Google into the DNS server of your domain provider. Notes: Only HTTP is supported, HTTPS is not. It will not work if you only modify the DNS record without actually assigning the custom domain in the Developer Console.