ravenlorans: They have Cyprus and Poland Open to me and it's still not going through....... They didn't even see the transactions go through I just did while on the phone with them.
GOG is just a pain in the ass to give money to, sadly. My favorite way takes a little bit of advance notice, but after you go do two things it's painless. Make a PayPal account. Go to a Walgreens or Wal-Mart or CVS or Target or someplace like that, and buy a prepaid card for PayPal (called a Green Dot card, where I bought it). Once you have established a positive balance on PayPal, you can use that money with no delay, however you want. As an advantage, if you want to budget yourself, well, it's easy when you're using prepaid funds ;)
With the prepaid funds, you don't have to give PayPal any of your personal financial information. They'll ask for it, all of it, but you can skip those steps and just load up the prepaid funds and get to spending.