Really your best bet is to join your local branch of the supporters club. We have gotten tickets for every match we applied for. Not sure if you have a particular match in mind and if this is an option timewise, but if you will be looking for more tickets in the future its worth it.
Used to go on occassion with my dad some years ago but haven't been in a long time. My GAA playing days and then arrival of kids put a stop to it. Hopefully, when the young lad gets a bit bigger, I'll start taking him along for a few games.
I remember one of the lads kicking a ball into United Park from the Gaelic grounds and scaling the fence to retrieve it. Think he as the first person ever to play GAA in United Park!
Are you still looking for tickets ? My partner has 2 for the match on the 19th. He said last week he didn't want to go.
How many are you looking for ? I'll ask him and get back to you if you're interested.
Out of all the companies I have used in the past I recommend a website called sohotickets.com - they got me tickets for the newcastle game this season and because it was a present for my cousin they sent the tickets next day to my address in dublin special delivery - what a weekend we had..