Good luck to you with that GY. You'll need it.
You can get everything from 2000 onwards easily on the hoganstand http://www.hoganstand.com/general/results/index.aspx and with a bit of care you'll get reports on every game from 1997 from the Examiner http://www.examiner.ie or the Indo http://www.unison.ie/irish_independent/.
Once you get past that though, you'll probably need to do a Jerome Quinn and spend a whole lot of time looking at microfilm in Belfast Library.
You can get everything from 2000 onwards easily on the hoganstand http://www.hoganstand.com/general/results/index.aspx and with a bit of care you'll get reports on every game from 1997 from the Examiner http://www.examiner.ie or the Indo http://www.unison.ie/irish_independent/.
Once you get past that though, you'll probably need to do a Jerome Quinn and spend a whole lot of time looking at microfilm in Belfast Library.