The Giant's Causeway, golf and Titanic Belfast are pulling in the visitors.
"The hugely successful opening of Titanic Belfast has already helped to generate massive worldwide publicity for Belfast and for Northern Ireland, " Mr Gibbons said.
She later attended a Worldwide Ireland Funds dinner at Titanic Belfast.
The ship, which is undergoing restoration at the Hamilton Dock in Titanic quarter in Belfast was used to transport first and second class passengers to Titanic at the French port of Cherbourg.
Thousands of people from across the world are already flocking to a Titanic festival in Belfast.
BBC: NEWS | UK | Northern Ireland | Titanic exhibition could be huge
It is estimated that the Titanic building in Belfast will need 290, 000 visitors a year to break even.
The fifth annual 'Titanic Made in Belfast' festival begins on Easter Saturday 15 April and continues until Saturday 22 April.
BBC: NEWS | UK | Northern Ireland | City celebrates Titanic anniversary
The Belfast Titanic Society had originally raised concerns about the impact on the memorial and the anniversary if the wheel's stay was extended.
There is undoubtedly enduring interest in the Titanic story - Belfast and Southampton both opened museums dedicated to the liner during the centenary year.
The exhibition will be opened officially at 1030 BST on Thursday by the Lord Mayor of Belfast Pat Convery and John Andrews, president of the Belfast Titanic Society and great-grandson of the Titanic's designer, Thomas Andrew.
The 100-year-old scale drawing was sold last year in England for almost a quarter of a million pounds, but the anonymous buyer has agreed for it to go on show at the new Titanic visitor centre in Belfast.
The dock is currently maintained by the Northern Ireland Science Park in Belfast's Titanic Quarter.
Prof Jonathan Moore, lecturer in Irish politics at London Metropolitan University, recalls the experience of an American student who recently visited Belfast's Titanic exhibition.
Twice as large as Belfast's Titanic Quarter and four times the size of London's Canary Wharf, it is the largest development site in public ownership.
The diagram will be coming to Belfast for the Titanic - At Home exhibition at the end of March and will be auctioned in April in Southampton.
BBC: NEWS | UK | Northern Ireland | Titanic blueprint to be auctioned
Work has begun to protect the Belfast dock where the Titanic was fitted out.
It also has plans to develop property in the docks area of Belfast to be called Titanic Quarter.
Telling the story of the building of Titanic, and of the people who built it, the exhibition this year will be staged at W5, the interactive discovery centre at the Odyssey Pavilion - just a few hundred yards from where Titanic itself grew majestically on the Belfast skyline 95 years ago.
BBC: NEWS | UK | Northern Ireland | City celebrates Titanic anniversary
Meanwhile, MTV has announced it will return to Belfast next year for the Titanic centenary event.
BBC: MTV European Music Awards are 'game changer' for Belfast
Production for seasons one, two and three of Game of Thrones was based in Belfast with filming in the Titanic Studios and at locations across Northern Ireland including the North Coast, Tollymore Forest Park, Castle Ward and the banks of the Quoile in Downpatrick.
The 'Titanic 100' exhibition will be held at Belfast City Hall until May.
The Nomadic, like the Titanic was built by Harland and Wolff in Belfast.
During the Easter week, Belfast City Hall will display 250 Titanic artefacts never seen before in Northern Ireland, which will be auctioned in England immediately after the festival.
BBC: NEWS | UK | Northern Ireland | City celebrates Titanic anniversary
"The Northern Ireland Tourist Board has identified the Titanic as being the signature project for the city of Belfast, " he said.
BBC: NEWS | UK | Northern Ireland | Events remember Titanic tragedy
The first series was filmed mostly on a huge set at Belfast's Paint Hall Studio in the Titanic Quarter, as well as various locations throughout Northern Ireland and Malta.
People visiting the website can follow the Titanic story which begins with the ship's construction in Belfast.
Sarel Gous is to brief Belfast City Council's development committee on plans for the Titanic II.
Every free flat in the Titanic Quarters ARC building has been booked and over 8, 000 hotel rooms in Belfast and beyond are reserved.
Locals have expressed concern about the images, which disrupt an ongoing trend of rebranding east Belfast's murals to reflect symbols of cultural heritage, such as the Titanic and George Best.
Events will take place in Belfast later to mark the 100th anniversary of the launch of the ill-fated Titanic.
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