Returning gem store items?
The last time it was in the gem store was February.
https://forum-en.gw2archive.eu/forum/info/updates/Game-Update-Notes-February-23-2016
Belinda’s Greatsword Skin has returned to the Gem Store for a limited time. It’s available for purchase in the Style category for 600 gems.
Anet does not usually announce the return of gem store items in advance. There does not seem to be any set schedule for most items. The best thing you can do is keep an eye on the gem store because that is what Anet wants people to do.
The Burninator