The deal was confirmed last night and Sneijder says he's excited about the switch.
"I am literally dreaming. I feel good, I'll have to learn Turkish ... I'm excited to go to Turkey, I will do my best. During the waiting in fact I learned a lot, I know that the Turkish fans are fantastic. I cannot wait to play, to get to Istanbul, to meet the fans. I'm excited and enthusiastic.
"I know a lot about the club, Fatih Terim, he's done a fantastic job everywhere and of course with the Turkish national team. I cannot wait to meet him.
"My message? I am proud to be joining Galatasaray. Really, I cannot wait to see these fans. We will live the great years together. I will be arriving tomorrow afternoon in Istanbul."