I just found myself needing to call an event from C# so thought I'd post the process here for any other noobs.
Add the using ORKFramework; to the top of your script.
Create a global object to call the events from ORKFramework.Events.GameEvent gameEvent = new ORKFramework.Events.GameEvent();
Create an inspector field to drag and drop the event you've created with ork into public ORKEventAsset eventAsset;
Now when you need to call the event simply use gameEvent.CallEvent(eventAsset, 0);