Filmed on location doesn't mean not from Hollywood. Hollywood isn't just the actual physical sets in LA, it's the entire industry.
HoC, GoT, all come from Hollywood. Heck, even GRRM was a screenwriter for Hollywood. The creators of GoT are also from Hollywood (Troy, Kite Runner, the awful X-Men Origins: Wolverine, etc.) and the show is run by Warner-owned HBO.
HoC, GoT, all come from Hollywood. Heck, even GRRM was a screenwriter for Hollywood. The creators of GoT are also from Hollywood (Troy, Kite Runner, the awful X-Men Origins: Wolverine, etc.) and the show is run by Warner-owned HBO.