The park will also have the most diverse range of native freshwater species of any offshore island in New Zealand, and populations of very rare frogs, native paua slugs and niho taniwha (chevron skink).
Conservation Minister Dr Nick Smith announced plans for the new park today at a community function in Claris with Auckland Central MP Nikki Kaye.
"This new park will bring significant conservation, recreational and tourism benefits to Auckland. My ambition is that with improved facilities and stronger protection, we will see more Aucklanders choosing to visit and getting to know the natural wonders of their own city on Great Barrier Island," Dr Smith said.
He said there would be some delay in implementing the new park with the extensive storm damage to Great Barrier Island in the last two months.
"The immediate priority is the restoration of tracks, bridges, repair of huts, signage, campgrounds and the Department's office" Dr Smith said.
The Government has committed $2.5 million to the repairs.