Thakur Ganpat Singh was born in Kharwa village.[2] A descendant of Rao Jodha, he was the son of the Istimrardar of Khawra Thakur Gopal Singh.[1][3][4] Ganpat Singh studied at Mayo College in Ajmer.[1] He succeeded his father as Istimrardar, taking over the family estate in May 1931. As of the 1930s the estate consisted of fifteen villages.[1] During the Second World War, he held the rank of Captain and served in the Western Command.[5]
Ganpat Singh was elected to the Ajmer Legislative Assembly in the 1951 election. He stood as the Bharatiya Jan Sangh candidate in the Nayanagar constituency. He obtained 1,958 votes (36.82%), defeating the Indian National Congress candidate Bheron by a margin of 111 votes.[6] However, Bheron petitioned the Election Tribunal, calling into question the result.[3] The election was declared void by the Election Tribunal in 1953 and a by-election was called.[7] Ganpat Singh won the by-election, obtaining 3,516 votes against 1,453 votes for Bheron and 391 votes for the independent candidate Birdha.[8] In the Ajmer Legislative Assembly, Ganpat Singh was part of the Assembly Progressive Party.[9] Together with other landowners, Ganpat Singh opposed the Ajmer Abolition of Intermediaries and Land Reforms Act of 1955.[10]
Ganpat Singh contested the Beawar seat in the 1957 Rajasthan Legislative Assembly election, again as a BJS candidate. He finished in third place with 3,836 votes (15.01%).[11]
Ganpat Singh's daughter Rani Lakshmi Kanwar Jodhiji married Ram Raja Singh, the last ruler of Khandela Bara Pana.[5]