LDAP - Unique Group ID

Is there a unique group ID field?  I am sure there must be
--but what is it?

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~|
Message: http://www.houseoffusion.com/lists.cfm/link=i:5:198352
Archives: h
ttp://www.houseoffusion.com/cf_lists/threads.cfm/5
Subscription: http:
//www.houseoffusion.com/lists.cfm/link=s:5
Unsubscribe: http://www.houseoffusion.com/cf_lists/un
subscribe.cfm?user=22184.15789.5
Donations & Support: http://www.h
ouseoffusion.com/tiny.cfm/54