"Don't do it to Hoa...Do it to me."
(Bloodchild, 26)
Courage is when you are afraid to do something, but you swallow that fear, and do it anyway. This is exactly what Gan did.
Although he grew up aware of what happens, having been told since very young, Gan was still hesitant in helping T'Gatoi remove all the worms from Lomas' body. However, he repetitively overcame any fear he had throughout the whole experience, and proved to be stronger than he thought.
At first, Gan does not want to even touch Lomas, but then proceeds to excuse his mother from the situation and do what needs to be done. He acknowledges the gruesomeness of the entire situation and even though he was afraid and repulsed the entire time, he did what we could to ensure that his siblings and mother would not have to suffer through watching any of it.
Despite the fact that he was afraid of experiencing the same fate as he witnessed with Lomas, Gan insists to T'Gatoi to "do it to me", instead of allowing his sister or any siblings to go through such an experience. Gan consistently overcame his fears and acted in a selfless way, for the sake of his family. Even if not all of his family members would do the same for him.