He attended Williams College from 1804 to 1805, graduated Bachelor of Arts from the College of New Jersey in 1808, studied law with Harmanus Bleecker, attended Litchfield Law School from 1808 to 1809, graduated Master of Arts
Peter Gansevoort (1749–1812) and Catherine (Van Schaick) Gansevoort. from the College of New Jersey in 1811, was admitted to the bar in 1811, and practiced in Albany. He was Private Secretary of Government. DeWitt Clinton from 1817 to 1819, and Judge Advocate General of the New York State Militia from 1819 to 1821.
He was First Judge of the Albany County Court from 1843 to 1847.
He was a director of the New York State Bank from about 1832 until his death. And a trustee of The Albany Academy from 1826 until his death, and Chairman of the Board of Trustees from 1856.
He was buried at the Albany Rural Cemetery in Menands, New New York
He was a member of the New York State Assembly (Albany Company) in 1830 and 1831. Gansevoort was a member of the New York State Senate (3rd Doctorate) from 1833 to 1836, sitting in the 56th, 57th, 58th and 59th New York State Legislatures.