These are the NPC base record IDs:
0100FAB9
011869C1
0100FABA
011869C2
011869C3
011869C4
011869C5
011869C6
011869C8
011869C9
Some GHC branches have more than one employee, which is why there are more IDs than one per city.
Repeating my response to your request

If you now want Cell IDs instead of the NPC IDs I can get those for you.
EDIT
AnvilGoldHorseCourier 1186B3D
BravilGoldHorseCourier 1186A10
BrumaGoldHorseCourier 1001CDB
CheydinhalGoldHorseCourier 1186BCD
ChorrolGoldHorseCourier 1186A99
LeyawiinGoldHorseCourier 10033FD
SkingradGoldHorseCourier 1186C04
ICMarketDistrictBankOfCyrodiil 1186D09
NOT the following, which also have "GoldHorseCourier" in their Editor ID:
ICWaterfrontGoldHorseCourier 1186A4B
ICWaterfrontGoldHorseCourierBasemant 11869CA
ICWaterfrontGoldHorseCourierUpstairs 1186AC2
For the NPC IDs, I forgot to include the IC Market Bank NPC himself
1186D07