Is it wrong if I'm not helping my gf with cleaning/cooking?
What is the reason you do not want to help her?
She should be the one who cooks and cleans.
If your girlfriend needs help cooking and cleaning around the house then you should do your best to help her. It is wrong to expect her to do all of the cooking and cleaning without wanting any help.
She should be able to handle it on her own and it's not a big deal.
Part of being in a relationship is helping each other out, not relying on them as you would a parent. Share some responsibilities with her or she won't stick around for very long.