cables:
any front brake cable will work fine with a gyro
for the rears, it's a case of setting up the brake right-
1) get the right length cables on the upper part. use dragonfly gemini upper cable.
2) get the straddle as far from the brake as possible, without being daft.
3) don't try and run a gyro with cantis
a gyro'd rear brake has protential to work better than a straight cable
as for the skyway, i think you need a particular type of sprocket, depending on the hub