Hi SoniaMehta,
Are you asking for a complete listing of all non-standard assertions for the Gateway? Such as Tactical or other custom assertions.
Due to the tailored nature of many of those assertions, we generally don't expose any complete listing publicly. Most of the non-standard assertions solve very specific use cases.
If you have specific needs that the out-of-the-box Gateway assertion suite don't cover, I suggest you work with CA Support or other CA representation to better understand how the wide capabilities of the CA API Gateway can solve your specific use case or scenario.
Cheers,
Ola