Answer:
Step 1 you ask how to make it on byedr.com, so that everyone knows you're desperate for sex and will do anything to get laid.
Step 2 you realize how stupid the question is and decide not to make ghb.
Smart move. Seriously what is possibly going on in your mind that would make you to ask a question like this?
You don't. Period.
Isn't that the date rape drug? Why would you want to make that? I mean i know why but that's just freaking wrong.