I read a lot of it while visiting my parents many years ago, but it was so long I couldn’t finish it. I shoudl get one on Amazon. But I’m totally, totally broke.
Click a book; pick a format:
http://archive.org/details/Gulag_Archipelago_I
http://archive.org/details/Gulag_Archipelago_II
http://archive.org/details/Gulag_Archipelago_III