If you wan't to use gicap in a complex you need to configure the sslClientVerificationMode cim property to optional.
Because it's not a dinamic parameter you need to proceed as follows:
[root@cc:wbem/sbin]# cimconfig -s sslClientVerificationMode=optional
PGC00210: The specified property cannot be modified.
CIM_ERR_NOT_SUPPORTED: PGS02207: The configuration property sslClientVerificationMode is not dynamic.
[root@cc:wbem/sbin]# cimconfig -s sslClientVerificationMode=optional -p
PGC00218: The planned value for property sslClientVerificationMode is set to optional in the CIM server.
[root@cc:wbem/sbin]# cimconfig -g sslClientVerificationMode -c -p
PGC00213: The current property value is disabled.
PGC00212: The planned property value is optional.
[root@cc:wbem/sbin]# cimserver -s ; cimserver
PGS10013: Shutdown time-out expired. A forced shutdown of the CIM server is initiated.
[root@cc:wbem/sbin]# cimconfig -g sslClientVerificationMode -c -p
PGC00213: The current property value is optional.
PGC00212: The planned property value is optional.