"What's good for the goose is good for the gander." Does it mean like that?
Whatever a man can do, so a woman can do the same thing,
Whatever a woman can do, so a man can do the same thing.

Question

"What's good for the goose is good for the gander."  Does it mean like that?
Whatever a man can do, so a woman can do the same thing,
Whatever a woman can do, so a man can do the same thing.

Answer

Yes.
Exactly that.

Answer

It simply means what's good enough for you is good enough for me.

Whilst goose and gander normally imply gender distinctions this is not always the case...it could be mean other opposing matters, such as political parties or civilian versus police.  For example, a police office being let off speeding but a civilian fined for speeding.

ご自宅で快適に語学を学べるチャンスをお見逃しなく。経験豊富な語学講師陣の中からお選びいただき、今すぐ最初のレッスンにお申し込みください！