Ghulamhaidar @ Yusof bin Khan Bahadar (born 9 June 1955) is a Malaysian politician who has been the Assistant State Minister. He has served as the Member of Sabah State Legislative Assembly (MLA) for Kawang since March 2004. He is currently a member of the Parti Gagasan Rakyat Sabah (GAGASAN) which is a component party of the ruling Gabungan Rakyat Sabah (GRS) coalition both in federal and state levels. Gulam Haidar is also the director of Yayasan Sabah Group.