He was born as the son of S. Gopala Krishna Pillai and Sathibai on 20 May 1972 at Chirakkara of Kollam district.

Gopalakrishna Pillai, his father, served as vice president of the Kalluvathukkal panchayat and is one of the Communist Party's Chathannoor constituency leaders.

[citation needed] In 2019, G.S Jayalal faced allegations related to hospital purchase without the party's consent.

An agreement has also been signed to pay advance without seeking permission of the party.

Criticisms against the move by Mr. Jayalal intensified pointing out that the deal has been made even as the C. Achutha Menon Cooperative Hospital run by the party's district committee remains shut for the past several months due to lack of funds.