As somebody from the Winter is Coming website put it, ASoIaF is more of a "political series with Fantasy trappings" than it is "a Fantasy series with political trappings", and the Game of Thrones TV series follows suit.
Well, humble little me might not be "somebody" but...
There's dragons, there's magic, there's prophecies, there's ice zombies, eternal conflict between forces of light and darkness, cataclysmic continent shatterings, magical artifacts, giants, forest beings, skinchangers, warging, legendary characters, hidden princes, it's about as epic fantasy as it can possibly get and books are getting ever progressively more steeped in it.
And while yes, the books are famous for playing out "realistic" consequences of our heroes' choices and actions, it emphatically does
not subvert any of those high fantasy conventions, all of those things are real within the world and they have rules. That is quite literally
the definition of a high fantasy setting.
Anyone saying ASoIaF and GoT don't count as fantasy because "there's politics in them" probably hasn't read much fantasy, because this is hardly the first that had such intrigues and plots and twisty backstabings in it...