Gilbert White Ganong (May 22, 1851 – October 31, 1917) was a Canadian politician, the 14th Lieutenant Governor of New Brunswick and co-founder of Ganong Bros. Limited, candy makers in the town of St. Stephen.

Born in Springfield, New Brunswick, the son of Francis Daniel Ganong and Deborah Ruth Kierstead, he was a descendant of Jean Guenon, a Huguenot exile from La Rochelle, France, who settled in New Amsterdam during the second half of the 17th century then several generations later following the American Revolutionary War, some of Guenon's antecedents were United Empire Loyalists who settled in New Brunswick (then part of Nova Scotia) in 1783.

In 1896, he was elected to the House of Commons of Canada for the riding of Charlotte.

On June 29, 1917, he was appointed Lieutenant Governor of New Brunswick and served until his death in October.

His death was due to "intestinal toxemia complications with nephritis".