A member of England's 2009 and 2010 Junior World Cup squads, Knight also spent four months following the Junior World Cup in Argentina with Counties Manukau in New Zealand as part of their wider ITM Cup squad.
Head Coach Bryan Redpath is delighted to have secured the 21-year-old's immediate future.
"Shaun has made great progress over the past couple of seasons and has a very big future within the game.
"Tight head is an incredibly technical position to play and it does take time for players to hone their skills to be able to compete at the highest level.
"The fact that Shaun is now featuring regularly in our first team squad at the age of 21 speaks volumes for how well he is doing."
Knight is following in his father's footsteps by playing for the club and added: "Everyone knows I'm a Gloucester lad and I love being part of the club. When I was approached about a new contract, it was an easy decision to make.
"I'm really happy with the way my game is progressing and I'm now looking forward to continuing to develop my game and featuring more at first team level."
Gilbert has released a new line of rugby cleats. The Gilbert Virtuo 8S is part of the exciting new product. Check it out.
The entire All Blacks apparel line has been updated for 2013/14. Check out the New Zealand All Blacks polo.
The Nike Tiempo is a solid rugby cleat and one of few styles still made from full-grain natural leather.
The Gilbert Blitz 8S rugby cleat is a great cleat at a great price of $69.99. Get a new pair of cleats today.
A cool looking all black rugby cleat with the high performance adidas is known for. Get in the Gear!
Wear the crest of the British and Irish Lions on your t-shirt. A great look for the summer.
The All Blacks Performance t-shirt is black with hints of blue from the training jersey. Very Cool.
The New Zealand All Blacks training jersey for 2013/14. Get in the Gear!
The USA Rugby Pro Alternate rugby jersey is perfect for any fan of the Eagles. Get yours to wear during the summer Test matches.
The NEW All Blacks 2013/14 jersey has arrived at World Rugby Shop. Dare to wear the colors of the All Blacks.