A victim of child sexual abuse is going to the Supreme Court for damages after receiving a pittance settlement from Brisbane Grammar School in the 1980s.

The then-student received $47,000 after falling victim to notorious paedophile teacher Keven Lunch and is the first person to bring forward a case under the statute of limitations amendments, claiming he was disadvantaged at the time.

The law was introduced by the Palaszczuk government last year and removed the previous time limit of three years for victims of institutional sex abuse to bring claims.