Cant you just sprey wd40 or other oil in the bit thats squeeking and see if that stops it?
Or just shove on one of those big mountain bike mudguards you get. Im going to have one of those on my crappy fixed.
Infact, just get rid of that Galaxy, all mudguards will squeek and get a fixed or one of these bad boys:
Think bout it, very little maintenence, the Dutch dont seem to maintain them at all, so they wont be any noise.
Sorted!