Chief Minister Pinarayi Vijayan, Assembly Speaker P Sreeramakrishnan were among those present on the occasion.
Vijayan presented a shawl to Gouri, who was the Finance Minister in the first cabinet headed by veteran communist leader late E M Sankaran Namboothripad that came to power in April 1957.
Gouri and CPI leader E Chandrasekharan Nair are the only two members of the first assembly who are alive now.
Nonagenarian leader Gouri was expelled from CPI-M in 1993 over alleged "anti-party activities."
However, she severed ties with UDF last year following differences with the Congress leadership.