Nightgunner.2896:

https://api.guildwars2.com/v2/account/wallet?access_token=806A2E66-D870-8E4F-BF35-840D64723775629D5348-A87D-4D4D-A90B-7BB3426B395C

I have 50 gems according to the API, but I actually have 0 ingame. The API also said I had 50 gems after I bought 600 gems for gold early in September and after I got 400 additional gems from achievement rewards.

Other currencies seem to be updating properly.

Lawton Campbell.8517:

This is a known issue. It’s pending a deployment of the backend component that handles gems which is totally outside my purview.