Ghulam Murtaza Shah Syed (Sindhi: سائين جي ايم سيد) (17 January 1904 – 25 April 1995), known as G. M. Syed, was a Sindhi political leader known for his scholarly work, spearheading the Pakistan Independence bill in the British Sindh Assembly (which is now Sindh Assembly). Later founding the Sindhi nationalist movement Jeay Sindh for the freedom of Sindh from the Islamic Republic of Pakistan. He is regarded as one of the founding fathers of modern Sindhi nationalism and Sindhudesh. His social and political engagements started from a mere age of 14 wherein he spearheaded the formation of labour unions such as the Sindhi Hari Committee (later led by Hyder Bux Jatoi) and also assuming membership of formal state institutions, like he did in the Karachi's civil authority boards.
Syed proposed the 1940 Pakistan Resolution in the Sindh Assembly, which ultimately resulted in the creation of Pakistan. However, he became the first political prisoner of Pakistan because of his differences with the leadership of the country, as he believed that they had deceived the people of Sindh.
On a more apolitical level, he was a committed Sufi and an active member of the Theosophical Society.