He graduated from Ripon College in Kolkata and earned a master's degree in English from the University of Calcutta.
He began his career as a teacher at Dinajpur College (now in Bangladesh), where he became closely associated with the Tebhaga struggle in 1946-47 and joined the Communist Party of India (CPI).
Ghosh, known as Comrade SKG within the party, fully immersed himself in revolutionary political activities during the Naxalbari uprising.
His notable works include: He also edited The Historic Turning Point: A Liberation Anthology (in two volumes) and wrote several books in Bengali, such as Bharater Communist Party (Marxbadi) – Ekti Mulyayan and Phire Dekha.
His unwavering revolutionary zeal and contributions to Marxist theory and practice remain a source of inspiration.