I would lean more towards male....Because of the full orange color on every fin...take for instance...females dorsal fin tips are orange only towards the back part of the dorsal but the front dorsal fin tips are mostly white, so you would have dorsal fin tips half orange and half white....and males dorsal fin tips are full orange from front to back.... and your GT has a thick orange band on cuadal fin....small green lines on gill plates and full color on body....but the thing that makes me think otherwise is because of the fish fin extension...this GT fins are rounded but could be cause of how small he is..but i would say most likely male...