>>24827
You should bring guro up in a off hand of a conversation. Then, if she shows any interest, you can leave little hints in conversation, texts and actions.
You can:
Ask her too look after your phone for [INSERT REASON HERE] and "accidentally" leave it open on a guro story you think she'd like based off your knowledge of her.
The next time you send her a link, send her a link to a guro image or story "accidentally" then send her the correct link.
Bring up guro and subjects to do with in conversation whenever you can to try and normalise it in her mind. I'm no psychologist, but from my experiences being manipulated the best way to convince her to get into guro is to make her think she came up with the idea to check it out, you're just the lackey who helps her find good sites to goon to.

I can't promise it'll work, but that shit has worked on me before.