I'm going to text my girlfriend even though she told me not to say anything.
Why would you text her when she requested that you say nothing?
Because I'm gonna raise hell later just like she did to me
If your girlfriend makes a request that it reasonable and within your power to do, you should consider doing it. Causing fights with your partner unnecessarily is unkind and unhealthy for your relationship.
You don't know her. I bet if I did it, she would like it.
She asked you not to, though. That means she doesn't want you to, and taking a "no" as a "no" is vital to a healthy relationship. If you ignore what she says because you think you know what she wants better than she does, you could hurt her.