Gamerscore is no longer updated !!!

Yep, seems like a Sync problem, I have faced this problem, don't worry, your gamerscore is there, just try what Eladio suggest or wait for it to sort itself.

Hey Iceman

Thank you for taking the time to post this on the Xbox Forums. We understand that you are currently experiencing difficulties with your GamerScore not properly updating.

This is a known issue that happens from time to time, and the
Xbox Support Twitter page has acknowledged this. This is something that should resolve itself, but you can usually speed this up by

removing and re-adding your account to your console.

Go ahead and give this a try and if this does not work, you can try using the suggestion provided by Xbox Forums Ambassador

Niko1664 to reach out to Xbox Customer Support.

I hope this is of some use to you.

Hello Iceman1302, you're not alone these days, follow these steps (https://support.xbox.com/en-US/contact-us#0:2:4):

Sign in to Xbox.com

Step 1: Scroll down and select Support at the bottom left under Xbox.
Step 2: At the bottom of the page, click Contact Us.
Step 3: Select Games, then "View Other Options"
Step 4: Select your problem
Select - "Show contact options"

Select - Request Support Call

Be patient, some achievements can take many days before sync. You can also try a power cycle after delete your account from console and re-download it

You're showing as a gold member on the forums. The gold member under your gamerscore and the G next to the gamerscore does not show as gold when you are gold. Since it says gold member, then that means you are a gold member.

The Rewards servers take longer to update than Xbox servers. So it can take several days to show an update in membership.

We are no longer rewarded for earning gamerscore, or having a high gamerscore. Those changes too effect in 2014.