the only thing in G.O.T that can really be compared to is Skyrim:
Winterhold-Winterfell
Riverwood-Riverrun
Summerset Isles- Summer Isles (I know it's not in Skyrim)
The Reach-The Reach
so on and so forth
But seeing how A Game of Thrones predates skyrim. I doubt Martin ripped off the series. Secondly the comparisons are in names alone. There are no Orcs in Westeros or Elves nor an Empire based loosely on Rome. What we have in the Song of Fire and Ice books is your typical fantasy world. These things happen look at the Lord of the Rings and compare that to the ES series, they at least have Orcs and Elves. (and Sean Bean)
Predating Skyrim doesn't mean much. Tamriel started with Arena, which predated GoT at bare minimum in release and there's no telling when Arena/TES was first conceptualized, although reports are from Bethesda that they started thinking about what would eventually become Arena while tossing ideas around with the team from Wizardry.
But if you really want to take the gloves off software-wise, it could be said that nothing in the CRPG arena can go a minute without thanking Zork, which in turn must spend its time thanking Colossal Cave Adventure. So now we're back to '76. And when you go back that far, you're smack into Elric of Melnibone, Book of Swords, and then game-wise, TSR and D&D territory, which only of course came well after The Hobbit and Conan the Barbarian.
And one can of course make the argument that all of this, swords and sorcery, gods, demons, stories of evil and valiant kings queens and champions, could not have been possible without the Bible, which is one of the greatest storybooks of all time.
It's really about where/when/who you want to stop saluting.