A few links:
http://www.forbes.com/sites/bethgreenfield/2011/12/14/10-things-you-didnt-know-about-gay-travel/
Note that the CME estimates $65 Billion yearly in spending in the US alone. A more recent study by the same group has that figure at $100 Billion yearly now.
And from the NY Times:
“This is such a high-traveling, high-spending population,” said Andrew Flack, vice president for product marketing and customer insights of Hilton Worldwide, adding that in the United States a higher percentage of L.G.B.T. travelers have passports than the general travel population.
One boost to gay tourism, travel industry experts say, is same-sex marriage. In New York City alone, the economic impact of the first year of gay marriage was $259.5 million plus $16.5 million in local tax and fee revenues, according to NYC & Company, the city’s marketing and tourism organization.
And the marriage and honeymoon business is still in its infancy. A 2013 study from Community Marketing found that most couples who married had their wedding receptions at restaurants and private residences. Nonetheless, hotels are preparing for an influx of same-sex ceremonies. Last year W Retreat & Spa-Vieques Island partnered with one of the first businesses in the United States to specialize in planning legal same-sex weddings. And this year, despite Florida’s same-sex marriage ban, the Westin Diplomat Resort & Spa in Hollywood, Fla., struck the words “bride and groom” from its wedding marketing materials and has two same-sex wedding planners at the ready.