They do have a gold backed product that trades on the ASX called Perth Mint Gold ("PMG"), code PMGOLD. Not sure if they'd release an ICO, or did you mean IPO?
See below for a description of the current instrument by Perth Mint:
ASX: PMGOLD
Perth Mint Gold ("PMG") is a right to gold created by The Perth Mint to enable you to invest in gold via the Australian Stock Exchange ("ASX"). PMG is structured as a fully paid call option to one hundredth of a troy ounce of physical gold and may be exercised by you at any time. PMGs trade on the ASX under the code PMGOLD and can be purchased by investors only on the ASX. Perth Mint Gold suits investors who prefer to manage their gold investment within their stockbroking account along with their ASX listed equity and other investments.
