G. tampophor is yellow in color, 15-20 millimeters long, with 39-47 leg pairs. It's characterized by a prosternum without sclerotic or chitinous lines; clypeus with three pairs of submedian setae, of which the setae of the anterior pair are farther apart than those of the median, and those of the median pair farther apart than the most posterior; spiracles all circular, last ventral plate moderately wide; coxal pores 5 on each side, the two innermost of which may be partly covered by the ventral plate; anal pores not detected.
