If you truly want the "I---" experience, do not rely on streaming. Your journey will take you to private trackers specializing in "Scene Nukes and Repacks" or the Internet Archive's pre-2012 software collection where old download manager logs hold the keys. The files are out there, but like a lost Stark banner, they are buried deep in the digital snow.
For those looking to experience the series today, official and high-quality options are the gold standard for preservation: Game of Thrones (TV Series 2011–2019) - Trivia - IMDb i--- Game Of Thrones Season 1 Archive.org