The former Senegal international has left Ewood Park for a short-term stay at Ibrox which he hopes he can make permanent.
Diouf was told by Rovers he could leave the club in January and there was some interest in him, mainly from West Ham United and Turkish Super Lig outfit Konyaspor, but ‘Gers have swooped for his services.
There is no doubting Diouf’s talent but it is his demeanor and discipline which have held him back from becoming a star in the Barclay’s Premier League.
Now he gets his chance to test himself in the Scottish top flight and he is excited about having a new set of fans to ‘wow’.
"I am very happy to join one of the biggest clubs in the world. This club has a great history. It will be great to wear the shirt and I will do my best,” he told the club’s official website.
"It's funny because I played against Rangers in the summer in Australia with Blackburn and I was talking about that with my friend Chris Samba and I know it's a massive thing for me.
"Rangers are known throughout the world and I want to be a legend here.
"I am so excited about this move. We have a huge game on Wednesday against Hearts because we must win every game in the league and then of course it's Celtic on Sunday.
"I know all about the big rivalry between the two clubs. I have seen many Rangers-Celtic games because a few of my friends have played for Rangers like Amdy Faye, Jean-Alain Boumsong and Fabrice Fernandes.
"Every one of them always said great things about the club in the past and I always remembered.
"He told me they were a massive club with a massive support and I had to take the chance.
"I was doing well at Blackburn under Sam Allardyce and I think I was playing the best football of my Rovers career but then he left and things changed.
"I am a loyal guy and I liked Sam and things were not working for me so when this chance came up I grabbed it.
"I know this is only a loan move but I would love to make it permanent. I need a change and this is great for me.
"I want to make the fans happy and play good football.
"I will also have the chance to play in the Europa League and that will be fantastic for my father Paolo because he lives in Lisbon."