Queen Street is the best place to go shopping in Auckland. I recently visited Great Kiwi Yarns, a Merino knitwear shop. It was amazing. Their woolen clothes were beautiful and luxurious, with all types of sweaters and jackets. The staff was very kind, never pushing but on the contrary, always listening to the customer's expectations. A very highly recommended place!

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.

It's a rather busy street with many shops and restaurants up and down the road and on adjacent streets. You could take a short walk or do some serious shopping here. It's not the cleanest street but you can even walk all the way down to the harbor or up a couple of blocks to Albert Park.