They kept GLD's market closed to long. If other exchanges can open for trading, there's no reason they can't. GLD's team made an update and released it. Why they can't update their system is anyone's guess. If you take GLD and the other 55 markets that are closed it isn't looking good for them. They are getting a lot of people upset and I bet a lot of them start using other exchanges when they can get their coins.
Right now I am thinking about changing exchanges. But we'll see what happens after they open the market again. I'll withdraw my original deposit plus some I made from trading and use the rest for trading. That way if anything happens I won't loose my original deposit.