I’m assuming you missed it, but for Cataclysm they offered Free Transfers to essentially merge the servers down. I think Hydraxian Waterlords RP Realm was going to do this as well but got petitioned to still exist for some reason.
Those servers, including Giantstalker are locked and if you don’t have a character already there are not open for creation so no one else will be joining you there. The post also says at the bottom they would remove all characters eventually anyways but obviously this still hasn’t happened over a year later.
Personally I’d bite the bullet and pay for a transfer. Your experience on such a dead realm won’t be a positive one unless you like playing solo, and there’s no confirmation date of the mergers and it might have been forgotten about. You can see Realm Pop with Ironforge or Raider.io. I would also check see if a Free Character Migration exists as it might allow you to move.
I think what they did was a good decision, left 5 healthy EU-EN Servers, really wish they’d do the same to Retail.