I'm sorry but don't know how to identify a tortoise's gender this way, but have you tried turning ur tortoise onto its shell and looking at it? Male tortoises have a concave-shaped 'stomach' under their shells aka their 'stomach' is curved inwards like a bowl while females have flatter stomachs. You can also check its gender by looking at its tail. A female will have a significantly smaller tail than a male tortoises does. If the tortoise has a long tail, it's most likely a boy. If the tortoise has a short, or even nubby-looking tail, then she's probably a girl. I hope this helps!