Several things, you need to find as much info on the ancestor who you think is Native. Try and identify as many of her relatives as possible and where they are from, the time period, etc. Then read about the local tribes for the areas they resided. Then start looking for the various records and tribal roles to find the names that match. For one thing you say she was born in Georgia, this is not where the Seminole originate so why do you think she is Seminole? If they were removed from their homeland what stories exist to verify your history? You have a lot of work to do. Treat her just like any other ancestor and research the heck out of her before tackling her from the perspective she may be Native. Then you need to try and identify her tribal affiliation at which point you use those sources. Researching Native ancestry means you need to know which tribe, because while they may have similar sources, they are not all the same. What I am saying, if you trace an ancestor back to England would you start looking at records in Italy? Good luck.
