If you are transferring, it depends on how many college hours you have completed. Click on the related links for GPA/admission requirements.
You can find undergraduate admission requirements at http://www.unt.edu/vwbk/admission.htm.
there's no minimum GPA but if you aren't in first quarter you don't have a chance
3.5 percent or better
It depends on your classification and other factors. You can view the admission requirements at http://www.unt.edu/admission/.