Versailles
When her sister-in-law Diane de Polignac invited her to the court at Versailles, Gabrielle came with her husband and was presented at a formal reception in the Hall of Mirrors in 1775, at which time she was formally presented to the Queen of France, Marie Antoinette, who was instantly "dazzled" by her, and invited her to move permanently to Versailles. The cost of maintaining oneself at the court of Versailles was ruinous, and Gabrielle replied that her husband did not have the money to finance a permanent move to the palace. Determined to keep her new favourite by her side, the Queen agreed to settle the family's many outstanding debts and to find an appointment for Gabrielle's husband.
Once she was installed in the palace, near the Queen's apartments, Gabrielle also won the friendship of the King's youngest brother, the comte d'Artois, and the approval of King Louis XVI, who was grateful for her calming influence on his wife and who encouraged their friendship. Gabrielle was, however, resented by other members of the royal entourage, particularly the Queen's confessor and her chief political adviser, the Austrian ambassador. In a letter to the Queen's mother, Empress Maria Theresa, the ambassador wrote, "It is almost unexampled that in so short a time, the royal favour should have brought such overwhelming advantages to a family."
Gabrielle became the undisputed leader of the Queen's exclusive circle and ensured that few entered without her approval. Gabrielle was considered by many of her friends to be elegant, sophisticated, charming, and entertaining.
Together with Pierre Victor, Baron de Besenval, Gabrielle played a key role in settling the affair: An Incident at the Opera Ball on Mardi Gras in 1778.
The entire Polignac family benefited enormously from the Queen's considerable generosity, but their increasing wealth and lavish lifestyle outraged many aristocratic families, who resented their dominance at court. Ultimately, the Queen's favouritism towards the Polignac family was one of the many causes which fueled Marie Antoinette's unpopularity with some of her husband's subjects (especially Parisians) and members of the politically liberal nobility. In 1780, Gabrielle's husband was given the title Duke of Polignac, thus making Gabrielle a Duchess, a further source of irritation to the courtiers.
By the late 1780s, thousands of pornographic pamphlets alleged that Gabrielle was the Queen's lesbian lover, including accusations that the pair had engaged in tribadism. Although there was no evidence to back up these accusations, they did immeasurable damage to the prestige of the monarchy, especially given the deep-rooted suspicion of homosexuality held by the bourgeoisie and urban working-classes at the time.
Several historians have suggested that reports of Gabrielle's extravagance have been greatly exaggerated, and they point out that, during her 14-year residency at Versailles she spent as much as Louis XV's mistress, Madame de Pompadour, had spent in one. Others have contended that to some extent she deserved her negative reputation because, despite the inaccuracies of the claims that she was sexually disreputable, other criticisms of her were valid: she was cold, self-centred, self-indulgent, and masked a love of gossip and intrigue behind a sweet-toned voice and flawless manners. This argument was particularly championed by the author and biographer Stefan Zweig, who wrote:
"Not even Madame de Maintenon, not even the Pompadour, cost as much as this favourite, this angel, with downcast eyes, this modest and gentle Polignac. Those who were not themselves swept into the whirlpool, stood at the marge contemplating it with astonishment ... [as] the Queen's hand was invisibly guided by the violet-eyed, the lovely, the gentle Polignac."
Another critic is Elisabeth de Feydeau.