What does a god parent do?

My guy best friend has chosen to have a baby via surrogate by himself. He's always wanted kids but feared of something happening between him and the mom or if something were to happen while she was pregnant he would only get visitation through the newborn stage and he wants to be there through the newborn stage. He's paranoid but he's decided to cut a mom out of the equation all together and have a child alone. I was skeptical that he's making a rash decision but in my post you were all brutally honest with me so I am going in to supportive mode. He's already got his surrogate and egg donor and the transfer is happening this week. He told me in God mother. So as a God mother am I the one who's supposed to plan the baby shower and stuff like that? I was a maid of honor at my sister's wedding and had to do the bachelorette party. So what do God mother's usually do?

Edit: Briabella I'm not against people choosing to be single parents. I just thought it was a hasty decision and something that should truly be thought out. I'm sure he will be a great dad I just worry about how overwhelming it can get and hard it can be.