Hi,
all available information around the policy scan topic is available in the documentation linked below.
Note: If you can’t find a specific policy test (e.g. PCI-DSS) this means that those are only included in the commercial GSM appliances including the GSF feed (see About the Feed Services (GCF & GSF) category).
https://docs.greenbone.net/GSM-Manual/gos-4/en/compliance.html