This is from the ABC
He was arrested for passport offences in 2016 and spent more than four years in a Thai jail, where his health deteriorated.
Police applied for his extradition at the end of the sentence and Gee was returned to Australia in 2020 and went on trial.
https://www.abc.net.au/news/2023-04-13/drug-trafficker-robert-gee-sentenced-to-20-years-in-jail/102218204