This is the Worlds biggest single brand association, and you have to own or ride one of Honda's GL models (Gold Wing or Valkyrie F6C) to become a member. GWRRA was founded in 1977 and have more than 80 000 members in 53 countries, mostly in USA and Canada. 
You may become a member of GWRRA as an "Associate Member". This is if you don't own or ride a GL model and still want to support GWRRA in one way or another. You will get Wing World magazine, member card and a various other material. You may participate in the same way as an ordinary member, but you have no right to vote or to be selected as an Officer in GWRRA, and you can't participate in meetings for Officers. You can participate in Chapter meetings.