The gateway has Generate UUID Assertion which is used to generate universally unique identifiers (UUIDs) . More information on this assertion can be found in
https://techdocs.broadcom.com/us/en/ca-enterprise-software/layer7-api-management/api-gateway/10-1/policy-assertions/assertion-palette/policy-logic-assertions/generate-uuid-assertion.html
What version of uuid is generated by CA API Gateway?
All Supported versions of API Gateway.
According to RFC the UUID can be of 4 types. More information about different types can be found in RFC
https://www.ietf.org/rfc/
By design, the API Gateway generates type 4 UUID (pseudo randomly generated)