Currently there is no way to deploy the data required to have multiple currencies in your target org.
You can deploy the settings for enabling multi-currency using the
Settings metadata filter (select
Settings for more specificity if required).
Once this is deployed, the target org will now have multi-currencies enabled. However, the actual currencies are data rather than metadata, so those will not be included. And unfortunately, Gearset does not currently have a way to deploy this data.
This is expected behavior. The
IsoCode field is a create-only field and right now we don’t support deployment of those types of fields for primary objects in data deployment. Here is further information on what Gearset can support.