Still abit confused about GEC and its potions.
Turning to Mike.
I still have the feeling you are not clear on the differences between GEC and EGC. Will come back after.
A GEC is a single conductor that connects to the ground electrode system at any point. It is a Single Conductor, and as such you cannot CHOKE IT. So if you run it in a ferrous metal, it has to be bonded at each end to make the raceway a part of the conductor. Otherwise it can be ran in plastic or aluminum raceway, or no raceway at all providing it is protected from damage.
An EGC is always ran with its associated phase conductors.
I know NEC 690.47, especially 690.47(D) has caused a fire storm in cycle 2014. It will be repelled. Unless you are using 2014 cycle ignore it. If you are using 2014 cycle conform to get inspected, then correct after inspection. Here are two videos from Mike Holt. They are are long and very specific.
The 690.47 (D) video Mike has done something he has never done. He point blank comes out and says it is Deadly and the dumbest thing ever to come out of the NEC. John Wiley is taking a lot of heat and lost a lot of respect. If you only watch one of the videos, watch the first one 690.47 (D) It will open your eyes.