Listen to Gnabakam Illaiyo (Duet) online. Gnabakam Illaiyo (Duet) is a Tamil language song and is sung by S. Janaki, K.J. Yesudas and Gangai Amaren. Gnabakam Illaiyo (Duet), from the album Malargale Malarungal, was released in the year 1980. The duration of the song is 4:14. Download Tamil songs online from JioSaavn.