Can I get a Gold code using my rewards money?

No. Gold can only be purchased via credit card/Paypal or by purchasing a prepaid card in a store.

I actually do the same thing and use the Microsoft reward points to get my Xbox Live Gold, It gives me more money to spend on games

I don’t think they give it to random people. I’m at least pretty sure it’s always specific people who maybe are subscribed to a Gold Membership, Ultimate Membership, or maybe someone who’s just very active on Xbox. However, If you want to get free money
codes you should try using Microsoft Rewards. You can get lots of things from it like Microsoft Store money, Xbox Live Gold, Xbox Game Pass, etc.

Cheers guys. I cancelled renew today because it's not my money and I noticed it finally used the Gold subscription from my pre paid codes and the 40% off I bought earlier in the year. I assume they don't mention these in hope they can get some money.

I have talk with XBOX Support on Twitter and the Phone Support,

Phone Support say to me its a Region Change and my Gold Membership comes back from inactive to active after MS transfer all my Data. Now 6 weeks later, nothing happens. I have still the same Problem.

My Gold Membership is still inactive, (In Moment i use a 3 Month Code-this works), but on Account Details i can see my Gold ends with last day of the 3 Month Code. Thats not Correct.

And a other Problem is XBOX Live Rewards cannot send me my Rewards Coins (Points, Money or else).

Please Microsoft fix my Account.

I want a fully working Account.

Thanks.