The first question to ask yourself is: Why does this need to be GPON? The primary advantage of GPON is that it's *passive* (on the distribution side, at least) - this makes it ideal for building networks where most of your infrastructure located in places that getting power is infeasible: for instance, common residential fibre networks where most of your infrastructure lives on unpowered poles or in ducts/chambers. I have not yet come across a network closet which doesn't have provisions for power: If this is a small-to-medium sized campus network you'd be better served by running ordinary optical ethernet and dropping switches where you need to aggregate capacity. GPON is a rabbit hole that you do not want to go down, if you can feasibly avoid it: Ordinary ethernet is simply easier. ~a