CHENNAI: Popular Tamil music composer, Gangai Amaran, brother of music maestro Ilayaraja, is likely to join the BJP on Saturday in the presence of party chief Amit Shah when he will address a public meeting for the first time after taking over as party president. Gangai Amaran called on BJP national general secretary Muralidhar Rao and party’s Tamil Nadu unit president Tamilisai Soundararajan on Friday.