Hi,
Graymail scanning for Bulk, Social and Marketing emails would work with ESA-ESP-LIC.
However, in order to use Graymail Safe Unsubscribe feature it would require L-ESA-GSU-LIC SKU as well.
For details on what each package consists of I would recommend working with your Cisco re-seller.
Some details are also available at:
https://www.cisco.com/c/en/us/products/collateral/security/email-security/guide-c07-736692.html
Regards,
Libin Varghese