P.O.Box shipping & Money orders?

Well, since my parents are very nosey and strict, I have found a few piece's i like on here. I was wondering does GC take money orders? And how would I go about this? And will they send to P.O.Boxes in the U.S.? Thanks..

 

And since I'm in the U.S. (michigan) how would I do a money order? Would I print somthing off the shop, fill it out, put CASH in there and send it to somewhere? explain RMJL, SJ, or Indy! thanks..

 

Thank you SJ.. I'll have to go get the P.O. Box first though.. I'll do it monday..