If one of the main beneficiaries is a local flying school, can your average bug smasher even fly a GLS approach?
No that's why it has to be a ILS.
All you need is a multi mode receiver.
And how much does that cost and how much weight will it add??
The other issue with the ILS being at the other end will be opposite direction traffic problems. ie aircraft landing into wind with people doing practice ILS's on the other end with the tailwind.