He is a narrow faced man with a long nose.
He failed to keep watch during that vulnerable night when the Spray was attacked by Trollocs. This was the same night that Thom Merrilin, Rand al'Thor and Matrim Cauthon arrived onboard, under attack.
He later turned up in Tanchico, working with Egeanin to recover a'dam and women who could channel. He and his men try to capture Nynaeve al'Meara and Elayne Trakand. Egeanin steps in to help the two girls and ends up beating up Gelb and his men.