幫仔仔澳洲移民問題?

There is one more method - Remaining Relative visa (subclass 115).

With this visa, you can apply a near relative for immigration.

The catch is this is a once-in-a-lifetime visa, which means the person sponsoring the visa can no longer sponsor any similar "remaining" visa in the future. So this visa is pretty much reserved for the least qualified relative for immigration.

首先，要睇你地生仔女當時，兩公婆是否有其中一個是澳洲公民或永居身份，如果是，仔女自然係澳洲公民:
可參考澳洲 HomeAffaris: 
https://immi.homeaffairs.gov.au/change-in-situation/had-a-baby如果否，即當時未取得公民/永居身份，生左仔女才取得身份，可為子女申請115簽證，從而令子女獲得永居，115可看以下資料。