Kua paahitia e GS housing te tiwhikete pūnaha whakahaere kounga o te ao ISO9001-2015, te tohu Akomanga II mō te kirimana ngaio mō te hangarau hanganga maitai, te tohu Akomanga I mō te hoahoa me te hanganga whakarewa (pakitara) hanga, te tohu Akomanga II mō te hoahoa ahumahi hanga (hangarau hanga), te tohu Akomanga II mō te hoahoa motuhake o te hanganga maitai māmā. Kua paahitia e ngā wāhanga katoa o ngā whare i hangaia e GS housing te whakamātautau ngaio, ka taea te whakarite i te kounga, nau mai ki te toro mai ki tā mātou kamupene.
