Matthew, I'm not thinking of "organizing an event," but my wife and I and another couple are coming to the Walker Cup for that weekend in September and will then head up to the Giant's Causeway / Portrush / Castlerock area via a round at Ardglass on Monday. It would be great to get together with any other GCAers who will be there, including yourself!
We will figure it out between now and then. Maybe we can all wear big GCA buttons or something similar!