Any ideas where you could get info on a gold coin womans head both sides with words Republique Francaise no monetary markings do date?

This might be "spielmarken". These are like Poker chips. In Europe during the 1800s and early 1900s it was common to find them designed to be similar to official gold and silver coins. Replicas of US gold coins were most popular. If that is what you have, unfortunately, it will not be gold, but only gold-colored.