hi i am a non custodial parent i have a 3yr old daughter with my ex girlfriend she took my daughter from me and gave her to the grandparents .?

Grandparents have no custodial rights in the state of Florida. You will need to establish paternity through an action called a Petition to Establish Paternity and Support. Through that action you will be able to offer the Court evidence that the mother is incompetent or unable to adequately care for the minor child (if indeed that is the case) and that you should be assigned the primary responsibility to do so.