In fairness, Sligo Steve, the Northwest isn't a very populous or developed part of Ireland and the population of the area is very sparse and spread thinly - therefore the proportion of out gay men will be very, very small. According to Census 2002, Swords (27,175) has a greater population than Sligo (19,735).
Research has shown again and again that gay people cluster into larger cities so as to build up a community and escape their small town roots, where they are often rejected. The larger the city, the greater the proportion of out gays in that population - there's almost a direct correlation. Thus Dublin does, and always will, dominate the gay scene in Ireland.
Maybe you could get GCN to run a specuial article on Sligo and highlight its lack of any gay bars etc. Maybe some change will come about if you push the issue.
I've always thought that the floowing towns could do with gay bars/clubs:
Whether any of them are large enough to support such venues is another question.