Gil was wasped, but by ZOLA, not agatha. Remember in the castle? Even dying on his feet, every time zola got in trouble he would dive in to save her. Gil is still a danger, and the worst kind of danger of this pans out as him "proving" he is safe by disobeying agatha. Maybe zola didnt specifically wasp him, but he DOES obey her, so someone pulled it off at some point.