I will assume then that when you "search on 'Google'" you actually mean visit your App Engine application via your custom domain <https://cloud.google.com/appengine/docs/standard/python/using-custom-domains-and-ssl#adding_a_custom_domain_for_your_application> .
If this is the actual issue where you only see the message "domain is no longer parked by GoDaddy" when visiting your App Engine application, than the issue is due to remaining DNS servers on Google Domains or GoDaddy that are still pointing to GoDaddy. To have your App Engine application correctly served with your custom domain, you must completely follow the App Engine Custom Domain guide <https://cloud.google.com/appengine/docs/standard/python/using-custom-domains-and-ssl#adding_a_custom_domain_for_your_application>steps 4 and 5 to ensure that your Google Domains A and AAAA records all point to App Engine <https://groups.google.com/forum/#!topic/google-appengine/iVeC-ns3u8s>. - Note that Google Groups is meant for general product discussions and not for technical support. If you require further technical support for configuring your custom domain with App Engine, it is recommended to post your questions to Stack Overflow <https://cloud.google.com/support/docs/stackexchange> using the support Google Cloud tags while following their how to ask a good question <https://stackoverflow.com/help/how-to-ask> guide. -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to google-appengine+unsubscr...@googlegroups.com. To post to this group, send email to google-appengine@googlegroups.com. Visit this group at https://groups.google.com/group/google-appengine. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/abd582d5-d99f-496f-8dfc-063b8345ccce%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.