It can be gory and sexual sometimes. Way different than The Walking Dead. It's probably for a more mature audience, so if your parents don't want you watching it, then don't watch it.
The Walking Dead is the same as American Horror Story in the sense of blood and gory, but twd is not as creepy or suspenseful. American Horror Story season 1 is not as scary as Season 2 or 3. There is less violence in season 1.