Is possible not configure Google App Engine custom domain without paying for Google Apps?

I want set custom domain for Google App Engine without use Google Apps or setup free Google Apps account how to do it now - since only paid version is visible?

I read Google App Engine documentation that is possible.

Where can you set up a custom domain for App Engine?

In the Google Cloud console, go to the Custom Domains tab of the App Engine Settings page. Click Add a custom domain. If your domain is already verified, the domain appears in the Select the domain you want to use section. Select the domain from the drop-down menu and click Continue.

From https://stackoverflow.com/a/23006209/8137:

I just discovered today (as of 2014-04-11) a new custom domain settings page is available from Google Developers Console:

Go to https://console.developers.google.com/project

Click on your project

On the left click "App Engine"

Click "Settings"

There you go! You can configure custom domain without the need of Google App account!