Ghulam Dastagir Alam Qasmi (Urdu: غلام دستگیر عالم قاسمی ; popularly known as G.D. Alam; PhD, HI), was a Pakistani theoretical physicist and professor of mathematics at the Quaid-e-Azam University. Alam is best known for conceiving and embarking on research on the gas centrifuge during Pakistan's integrated atomic bomb project in the 1970s, and he also conceived the research on charge density, nuclear fission, and gamma-ray bursts throughout his career.