Two ways to get it there: fly it or ship it.
Flying involves an IFR 2000 mile leg to Hawaii, so probably isn't an option.
Shipping means packing into a 20', 30' or 40' container and sailing across the high seas. I know of one company that has shipped aircraft to Oz called aussiecarimports, but there are probably plenty of others.
You need to cancel the US registration, get a local registration and airworthiness inspection to get your local airworthiness approval.
A pre-buy inspection by an A&P, who has been briefed on your local requirements, would be a good idea.