Have you already seen Gunnar meeting with Everett? It should trigger by exploring Northcrest Training Ground on Tue, Thu, Sat (during 8:00-18:00). Also, you need to visited both Mythshore and Orc's village to trigger this event.
So, have you meet Everett talking with Gunnar about MC yet? It's a requirement for Everett conversations. If you are sure that you have met every requirement event for the meeting, just try it again. Because it also RNG to trigger.
