How much GMC can you earn?

Let's not forget that one of the many reasons to play gamemodes (other than having fun) is to earn GMC. GMC is used to spend on Lobby items and upgrades. It's a reward for playing our games - how nice of us!

So, exactly how much GMC can you earn while playing this gamemode?

You always earn 50 GMC, no matter what.
If your team survives the day, you also earn 15% of your points as GMC.
You get bonuses for damaging the boss the most as well.