Definitely scam.
Their website seems to be down

To the creator of gld.minepool.net

I have been mining for over 24 hours almost continuously and my pending payout is 34.87. I have been operating at a high hash rate
of between 500 - 2000 KH/s for that time. I have not yet seen a single real coin go into my account balance.

Questions
1) Why is your support page not working? I wanted to send you a PM but instead have to resort to a public forum ...
2) Why is a pending payout of 34.87 not being paid out?
3) Why is the payout so low despite the estimated GLD/day having sat continuously around 100 - 300 for my user name over the last 24 hours?

Did you solve this? What was the problem?

Im having the same problem with four GTX 580s . I have a GTX 690 and its running at 300KH/s for -l K42x7 which was found by hand.  -D and auto tune showup nothing and cause a crash.

Cudaminer is crashing for my 580s. The only configuration that isnt crashing is -l K1x1.
Any ideas would be great!