I too am confused. Why do you care about GC so much?
I think the point is that D1 recruiting is now spread more widely across LI. In the “old days” a high percentage came from GC or Manhasset. Chaminade and St. Anthony’s are now the clear leaders with other D1 recruits coming from all over thanks to the rise of the club teams.
You may want to check the Hometowns of some of those Chaminade St Anthonys recruits, you'll be surprised how many are from GC/Manhasset.
Not sure I understand your point. In last few years there have been several Chaminade kids from GC who committed to play D1 lacrosse. To my knowledge all played for the big club programs and not for the GC team. The coach historically did not let GC kids play for his program unless they also went to GC High School. The reality is that Chaminade has put more GC residents into D1 programs in recent years than GC itself.
Not sure about current rosters but in the past some of the best players at Chaminade and St Anthony's have come from the "Lacrosse Towns". Massapequa, Garden City, Manhasset, Syosset, CHS, Smithtown, Ward Melville and others. Kids from all over go these schools. It's not just about Lacrosse.