I have hired a developer to host Wordpress site on the Google Cloud and App Engine. He is asking me to provide my password of Gmail account so that he can host it for, but I don't want to provide my password to access Google APIs console. Is there any way to give access to other developer to work, just like Google Play Developer Console?
Yes, if you go to the following URL you can add developers to the project:
https://console.developers.google.com/project/<application-id>/permissions