Now a tropical depression, Gilda remained nearly stationary for another 24 hours before accelerating northeastward, under the influence of an upper-level trough exiting the east coast of the United States. Cold air from the trough interacted with Gilda, providing a baroclinic environment for intensifying, and on October 24 the storm transitioned into a subtropical storm about halfway between Hispaniola and North Carolina. This made Gilda the first tropical storm on record to transition into a subtropical cyclone. Operationally, tropical storm advisories were still issued on Gilda while it was subtropical, due to the need to maintain consistency and the possibility it could again become tropical. The circulation of the storm became very large, at one point stretching from New England to the Bahamas, and eastward beyond Bermuda, or a diameter of more than 1300 mi (2100 km). On October 25, Gilda passed about halfway between Bermuda and Cape Hatteras, when it reached peak winds of 70 mph (110 km/h). Subsequently, it turned northeastward, and on October 27 attained a minimum pressure of 984 mbar, the lowest of its duration while tropical or subtropical. Later that day, Gilda became an extratropical cyclone southeast of the Canadian Maritimes as it moved over colder waters. After passing just southeast of Newfoundland, the storm continued northeastward, becoming nearly stationary off the coast of Greenland before dissipating on October 30.