The Academy prospects have both featured in the Cherry and Whites' first team this season,and are regulars in the A League side.
Robson has also played for Hartpury RFC in National League Division Two South and will shortly be linking up with the England U20 squad for the Six Nations campaign, in addition to featuring in the Junior World Cup last summer.
Evans, a No 8 by trade, has also impressed during his time at Kingsholm, and Academy Manager Mark Cornwell said that the new contracts are down to the hard work that the pair have put in.
"Dan and Gareth have both come on leaps and bounds in their time here at Gloucester," he said.
"They've both got talent but have also applied themselves and this is reflected in their development.
"They've both had a taste of first team action and the challenge now is for them to carry on working hard and force their way into the senior matchday squad on a regular basis.
"I'm really pleased for them both and hopefully they'll have a big future with Gloucester Rugby."
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.