HOw to get GBs in CrossFire ?

Hello everyone iam new to crossfire and i dont know the best way to get Gb cos all i got now is 2500 and i really wanna buy a new weapon

play more and try to play more of modes when u don't use ur own guns like eleminations or any thing because that way you won't have to repaire your gun and when you reach a certain amount of money say you wanna buy a scar thats about 45000gp stop repairing your gun when you reach 35000gp that way you will not loose gp any way the best way is to play more