Gadhdhoo is an inhabited island in Gaafu Dhaalu Atoll administrative division and geographically in the Huvadhoo Atoll in the southern part of the Maldives. It is an island-level administrative constituency in upper south province, governed by the Gadhdhoo island Council.
Gadhdhoo is famous for its thundukunaa. The intricately woven mats are produced from a reed called hau. Gadhdhoo was the atoll capital of the Gaaf Dhaalu atoll in 1960s. Later the atoll capital was moved to Thinadhoo island in same atoll.