Auckland is a souvenir shopper's delight (which is me!).
Queen St does have some good gift shops but also a mix of high end boutiques, banks, travel agents etc. You will find excellent souvenir shopping opportunities equally on Albert St that runs parallel, around the Sky Tower at SkyCity area and, in particular, down at the ferry terminal quayside (also great restaurants down there).
All within a walkable distance for a lovely few hours of retail therapy.
Note :- the Sky Tower has one of the best gift shops and you may well be able to access it without buying a viewing ticket? If not, it's still a good place to go.
The possum & merino mix wool products are especially good quality in NZ shops and a fair price.