GB_T_VOID
GB_T_BOOLEAN
GB_T_BYTE
GB_T_SHORT
GB_T_INTEGER
GB_T_LONG
GB_T_SINGLE
GB_T_FLOAT
GB_T_DATE
GB_T_STRING
GB_T_CSTRING
GB_T_POINTER
GB_T_VARIANT
GB_T_NULL
GB_T_OBJECT