First step :
Sing Up to http://bit.ly/1kqgIpz This site will be used to buy GHS ( trade GHS), and for your bitcoin address (at balance menu).  

Second step :
Sing Up to https://launch.stellar.org After email and facebook confirmation you will receive STR coin during the next day.

Last step :
sign up to https://justcoin.com/ In this site you will trade your STR coin to BTC. SMS confirmation needed to enable trading.
Withdraw your BTC to  http://bit.ly/1kqgIpz  btc address, after 3 confirmation your deposited BTC will be available to buy GHS.

Good Luck and enjoy.