The Law of the Earth guarantees every person the Right to Freedom of Relationship: to relate with any person in any mutually consensual way, with or without anyone else's approval. Human rights apply regardless of identity or orientation.
Marriage is a personal matter between the people in it. No one needs anyone's permission to marry except the person they're marrying, and no one may be forced to recognize a marriage their conscience doesn't consider valid.
Everyone has the Right to Freedom of Dress, and the Right to Physical Integrity, including freedom from any anatomical alteration they haven't consented to. Children are sovereign beings with all the same rights.
Our full stance on the specific questions in the news, such as sports and medical care for minors, is still being written.