sorry, there's still too little information for us to help you. i am assuming that you're running the stock win7 home premium 64bit with SP1, and you have updated your drivers and stuff from asus, including the bios.
it maybe helpful if you could describe what you have done before the bsod started to appear.
except for stuff such as keyboard back lid that cannot be turned on after sleep, and speaker's issue, i think g55 runs without issue (at least mine is like that from day one). i had a few bsod before but it's due to user problems.