Following are the courses available for GRC in SAP
GRC300 - SAP GRC Access Control Risk Analysis and Remediation
GRC310 - SAP GRC Access Control - Compliant User Provisioning & Enterprise Role Mgmt.
TGRC20 - Virsa Compliance Calibrator
TGRC30 - Virsa Access Enforcer
ADM955 - Installation of GRC compone.
But the above 5 documents doesn't mean as one GRC Certification.
If you wish to do certification on Virsa AE version 5.1 you can take up TGRC30 - Virsa Access Enforcer separately.
If you wish to do certification on Virsa Compliance Calibrator 5.1 you can take up TGRC20 - Virsa CC separately.
ADM955 (SAP GRC Access Control - Installation ) comes with SAP SECURITY WITH NETWEAVER 7.0 Certification.
and GRC300 and GRC310 are separate courses of version 5.3 . This can be taken separtely.