iOS turn-based multiplayer?

So, what I have so far is a blueprints only, turn based local multiplayer running on iOS devices (iPhone and iPad) that I hope to release someday soon! I have played with replication for online games, but what I need to understand is how to, in a very basic form, set up GameCenter and send the “turn information” to a second device through blueprints (if possible).

I get this is unrelated to replication but I can’t seem to find what I’m looking for under the documentation. Please help?