GEC is for connecting your grounding electrodes together to form your grounding electrode system.
dmattox,
Don't mean to be nit picky, but I have seen some get confused by this point. The GEC is used to connect the grounding electrode system to the service grounded conductor and/or equipment grounding conductor (see the definition in article 100). The conductor(s) used to connect the grounding electrodes together are bonding jumpers (See 250.53(C))
Edit: because I realized that by oversimplifying I had introduced some inaccuracies in my post.
[This message has been edited by eprice (edited 11-08-2005).]
