What is the best way to earn gp on crossfire

If you're rank is under Staff Sargeant 1st class, then the best way to earn GP is to level up.
How much you get:

• Private 1st class - 10,000 GP
• Sargeant 1st class - 20,000 GP
• Staff Sargeant 1st class 30,000 GP

But if you are over Staff Sargeant 1st class then try to minimize the damage your gun recieves. To minimize the damage your gun recieves, try to not spray (When your gun fires 5 or more rounds without stopping) unless you are in very close combat or are facing multiple enamies at one time.
P.S. I am Ilvsy1 in crossfire.

You can also earn extra gp by not repairing useless guns like m16 or m700, and also by not repairing temporary crate guns. (type 89 is still very accurate when broken, compared to other broken guns) You can also farm(one person stands there while you kill them repeatedly). Lastly, you can play hero mode(gives you the most gp of all the modes). You can even do surveys to earn free zp, then you can buygp with gp. (BTW, my account's in game name is i_suck_, check out my profile, my many gp guns prove these methods work)