I'm confused by this. If your phone is set up and working then it would have to have a gmail account associated with it, it's part of the setup if you ever installed apps or updated them. In which case you can find it here:
If your phone is off, no SIM card, not activated then....you'll just have to keep looking.
Sorry, But I was really trying to locate my 20+ year old daughter in an
emergency situation. Her phone is in my name and account and I pay bill but
she set it up and I didn't have her google account info. But all worked out
and I was giving it a shot. Sorry fo any inconvenience it might have caused