Her husband, John, was involved in the Wonnerup massacre, and she has been the subject of research into how records and family history documents obfuscate the telling of those events.

In her youth she was caught up in the Christian revival sparked by the preacher Edward Irving but implemented in a milder manner by Rev.

Until 1836, Molloy's life was one of great hardship, typical of early settlers in Western Australia but unfamiliar to one of her social class in England.

Thereafter, together with her husband John, and local indigenous women, she spent nearly all of her leisure time in collecting, collating and documenting botanical specimens of the south west of Western Australia.

The specimens sent by James Drummond, a professional botanist, were poorly packed and carelessly labelled, and seeds consistently failed to germinate.

She continued to collect seed, making use of the knowledge of the local Indigenous Australians, and she taught herself the rudiments of botany from books sent to her by Mangles.

In 1841 Georgiana's husband John and the Bussell brothers led a massacre of dozens of Wardandi Noongar people in reprisal for the spearing of George Layman.

This information is generally not included in publications discussing her life and none of the surviving letters and diaries of Georgiana mention this occurrence.

Angela Campbell, who researched Georgiana Molloy for 10 years before finding out about the massacre was shocked to discover this "devastating" information.

On hearing of her death, George Wailes, a horticulturist who had been most successful in growing from Molloy's seeds, wrote to Mangles: Not one in ten thousand who go out into distant lands has done what she did for the Gardens of her Native Country, and we have indeed as regards her specially to lament, that "From Life's rosy Chaplet, the Gems drop away.

In 2023 The West Australian identified 100 people who had shaped the state of Western Australia and they included the teacher Amy Jane Best, the educationalist Ursula Frayne, settler Emma Withnell, suffragist Bessie Rischbieth, politician Edith Cowan, Dr Roberta Jull and Molloy.