Not many 15-year-olds can say they have made Australian legal history and helped other transgender young people across the country. But then not all 15-year-olds are like Georgie.

She's a Taylor Swift fan, a talented singer and songwriter and loves her family's ageing golden labrador Roxy (who has a weak spot for biscuits). So far, a teenage girl.

Georgie, her family and other transgender young people say court control over medical treatment is invasive and unnecessary. Credit:Penny Stephens

But when she was 10, Georgie was the subject of a landmark legal case, known as Re:Jamie, and its later appeal.

This successfully challenged the need for Georgie to get a judge's permission to begin puberty-blocking medication, the first stage of treatment for transgender children.