Gedrosia (; Greek: Γεδρωσία) is the Hellenized name of the part of coastal Makran in what is now Balochistan. In the accounts about Alexander the Great and his successors, the area referred to as Gedrosia runs from the Indus River to the north-eastern edge of the Strait of Hormuz. It is directly to the south of the provinces of Arachosia and Drangiana, to the east of the province of Carmania, and due west of the Indus which formed a natural boundary between it and western India. The native name of Gedrosia might have been Gwadar or Gwatar as there are two towns by that name and three bays with similar names (Gwadar East Bay, Gwadar West Bay and Gwatar Bay) in central Makran.
General info from Wikipedia.org