It was a massive day for Dessie Farrell, and one that he felt would mark another significant step forward for the Gaelic Players’ Association. On a September night in 1999 in Belfast’s Wellington Park Hotel, the then Dublin footballer had sat at the top table for the body’s launch meeting. Not many thought the GPA had any chance of lasting. After all, previous attempts at forming a GAA players’ union had fizzled out quickly. But thanks to Farrell and a few other determined characters like Kieran McGeeney and Dónal Óg Cusack, the GPA stayed the course. And, nearly three years…