This thread has taken a peculiar turn!
I would never describe anyone as middle class in Ireland, middle income certainly, but here people are gainfully employed (doctors, cleaners, factory workers IT specialists), retired, short or long term unemployed or independently wealthy (maybe through a large inheritance or winning the Lotto). Gaelscoileanna are often located in less affluent areas so to target them as middle class is unwarranted.
New school, lucky you, far less pressure for parent fundraising as school can target money towards things other than huge heating and electricity bills. Very few non Irish, so what, they will take everyone in the catchment until they become over-subscribed and the school won't discriminate based on creed or colour. A gaelscoil won't necessarily be the first choice for newly arrived immigrants but their children may well choose it for the grandchildren.
Smart phones, really? No primary school aged child should have a smart phone! It's a can of worms.
"Designer label clothes and shoes" - so shallow - such things are not going to get anyone points in the Leaving Certificate. Why would you want your young child/children to be impressed by such things:
Sounds like your DC is in a perfectly lovely school. Parents sometimes choose to move school in the best interest of their child but I've never come across someone who would do it for such reasons.