Grand Central Ext.21, Johannesburg

File:South Africa Johannesburg location map.svg

Chigaŵa cha Gauteng, South Africa

Grand Central Ext.21, Johannesburg ni ni msumba udoko mu msumba ukulu wa Johannesburg (Chigaŵa A), mu chigaŵa chikulu cha Gauteng, charu cha South Africa, ku mmwela kwa chilwa chikulu cha Afilika.