“Gender identity” means a person‘s gender-related identity, appearance, or behavior, whether or not that gender-related identity, appearance, or behavior is different from that traditionally associated with the person’s physiology or assigned sex at birth. Gender-related identity may be shown by providing evidence including, but not limited to, medical history, care or treatment of the gender-related identity, consistent and uniform assertion of the gender-related identity, or any other evidence that the gender-related identity is sincerely held as part of a person’s core identity provided, however, that gender-related identity shall not be asserted for any improper purpose.