got a charge for grand theft third degree . what will the outcome be in court for this

The maximum penalty for grand theft third degree is 5 years prison.  Unless you have a horrible record that is highly unlikely. However, every case is differnt and every jurisdiction is different in the way they handle cases.  You may even be eligible for a diversion program resulting in a dismissal.  I would highly recommend that you call a criminal defense attorney  in your county and let them give you a better idea of what options are available in your particular case.