How does Ship GP affect GAC Matchmaking?

I sincerely doubt Ships GP comes into the matchmaking equation at all. As someone who spent a lot of time in small guilds before making the jump into a larger one, I ran into 7* Negotiators and Malevolences (both from single opponent) when I only had a 5* Negotiator.

I could be wrong so take my opinion with a grain of salt but facing the huge disparity in ships has cost me a lot of GAC wins due to staying with friends in a smaller guild for as long as I did.