I have never seen GAA football, hurling or camogie played either in a gym , community hall , small sized Astro pitches or 5 a side pitches .
It’s telling that in any space I played small sided games I’ve seen football goals & basketball hoops but never Gaelic Goalposts , because of it’s physicality GAA football and the preponderance of high balls is totally unsuited to either indoor or small sided Astro pitches and as for Hurling & camogie !
I think it’s obvious that most small sided games are football games played by a huge number of people.
Some junior clubs do indeed have Astro pitches and make a few bob , more power to them but the vast majority of small sided venues are owned by schools , communities, local authorities or private enterprises.
A couple of LOI clubs have artificial pitches but the majority do not .