Even though rings are so culturally charged, there are not many rules that are really attached to them. To give you an example, the right-hand-left-hand issue cannot be answered with an irrefutable argument. In short, there are no strict rules about the hand on which you should wear your ring(s).
Canadian GAA is the informal name by which the Canadian County Board of the Gaelic Athletic Association is usually known. It is one of over 30 regional executive boards throughout the world.
Canadian GAA has jurisdiction over the whole of Canada. The Board's role is to promote and regulate Gaelic games as well as to bear responsibility for the Board's inter-county teams. Another editor seems to think that this is either non NPOV or involves a name change.