When you think of the Statue of Liberty, it’s almost always as a straight-on front view, with that pointy tiara silhouetted against the sky.
I found a video taken from a helicopter circling above and to the back. Her hair seems to be fixed in this odd sort of tuck or knot, with curls or rolls on the side where the crown is attached. Here’s a screenshot.
Yes, that last Greco-Roman statue looks close. Of course, statue hair need not obey the laws of physics.
I would not be qualified to judge the correctness of a Gibson tuck. The photo you posted seems a lot more complex - more of a knot, like a Swedish woman would have.