St. Joseph Cathedral School Handbook: A reference manual for principals and school board members.

St. Joseph Cathedral School Parent and Student Handbook

For reference you can turn to this handbook in crafting a policy in your school, key points are made on Page 65:

ADHERENCE WITH CATHOLIC TEACHING ON SEXUALITY
Students may not advocate, celebrate, or express same-sex attraction in such a way as to
cause confusion or distraction in the context of Catholic school classes, activities, or
events.
All students are expected to conduct themselves in a manner consistent with their
biological gender.