Robson has also been a regular for Hartpury RFC in National League Division Two South and will shortly be linking up with the England U20s squad for his second Six Nations campaign in addition to featuring in the Junior World Cup last summer.
Gloucester Rugby Academy Manager Mark Cornwell told the club website today 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. 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."