According to r/gameofthrones, apparently GRRM responded to this blog post from 2013 with "This guy gets it" regarding Dany:
Source: https://www.reddit.com/r/gameofthrones/comments/bo1ast/spoilers_found_on_twitter_apparently_grrm/
Source: https://www.reddit.com/r/gameofthrones/comments/bo1ast/spoilers_found_on_twitter_apparently_grrm/