Apologies for replying to this so, so late. Gussie Moran was an American tennis player.
From the NYT Obit:
Gussie Moran, who as a ranked American tennis player in 1949 caused an international stir and gained worldwide fame for competing at Wimbledon while wearing a short skirt and lace-trimmed underwear..
They called her “Gorgeous Gussie,” once one of the best tennis players in the world who became a household name the year she dared to reveal a glimpse of her ruffled panties and set Wimbledon on its collective ear.