Hi Elaine,
Nice to see you again, I come and go with this genealogy thing, but was just trawling over my old emails and found this link, and here you are!
Yes, the Gauls, They are from what i know originally all from France via the south east of Ireland, mainly county Wexford, though a few found their way into County Carpow.
Your person, i mught be able to enlighten you, but only ever so slightly, I would put money on it, that the father, Phillip was from a place called Ballymurphy, I have many Gauls on my genealogy list as my grandfather, before he was married to my grandmother had a first wife and children with her(my uncles and aunts). Her father was a James Gaul from eastern Carlow, James had a son called phillip in 1871, I'd say he named him that after his own father as phillip was his eldest son. james himself was a late starter with the kids, and was in fact born in 1815, so the Phillip on your query could very possibly be James brother? I have no record of a phillip in the early 1800's but the records for Borris which is their parish, don't go back that far.
So now we are related on two fronts! LOL! How very rural Irish!
So just in summary, the Phillip Gaul, who was the father of your Mary Gaul and married to Bridget Aughney was probably my step grandmothers uncle. I can give you a rundown on the gauls if you want, i can send you a word file to your email, though i could post it here too.
hope all is well with you, and talk soon.
pete x