Stone was born on July 11, 1985 and grew up in Newton, Massachusetts. She began rowing in 2001 at the Winsor School. Gevvie graduated from Winsor in 2003, and she continued to row at Princeton University where she graduated in 2007. She attended Tufts University School of Medicine while training for the London 2012 and Rio 2016 Olympic Games, graduating with her M.D. in 2014. She is currently an emergency medicine resident at Beth Israel Deaconess Medical Center and an athlete ambassador for Fast and Female, an organization committed to empowering young women between the ages of 8 and 18 through sports.
Family
Her mother, Lisa Hansen, was also an Olympic rower, competing in the women's coxed quadruple sculls at the 1976 Olympics in Montreal. Her father, Gregg Stone, was the top U.S. single sculler in 1980 and would have been an Olympian himself if the U.S. had not boycotted the 1980 Olympics in Moscow. Both of her parents were members of the U.S. National Rowing Team. When Gevvie was in high school, her mother Lisa coached her along with her high school team at the Winsor School, and Lisa continues to be Winsor's rowing coach today. Her father Gregg is now her coach.
In 2011, Gevvie placed 13th in women's single sculls at the World Rowing Cup III and 11th in the women's single sculls at the World Rowing Championships. In 2012, she placed 3rd in women's quadruple sculls at the Final Olympic Qualification Regatta and 8th in women's single sculls at the World Rowing Cup II. Two years later in 2014, Gevvie placed 4th in the World Rowing Championship. In 2015, she placed 2nd in the World Rowing Cup II, 3rd in the World Rowing Cup III, and 4th in the World Rowing Championships all for women's single sculls. In 2016, she placed 2nd in the World Rowing Cup II for women's single sculls before winning silver in Rio.
In 2018, Gevvie won the women's Championship Singles race at the Head of the Charles Regatta for the ninth time and the fifth year in a row. Several years earlier in the 2002 Head of the Charles, she and her boat from the Winsor School won the women's Youth 4+. In 2005 and 2006, her Princeton boat won the women's Championship 8+ in the Head of the Charles.