It can get in the way of Gush, but it has to be played before Fastbond. This means they can see it and just search or draw for bounce.
Why does everyone seems to think that they just have to bounce a threath at any time? If if was so easy, why would anyone play any permanents. When running 5-6 fetches or more, it can take a few turns to Scroll for the most of the time only bounce spell in the deck and cast it. It costs ressources and slows their gameplan. And, after it is bounced, they must win now (not so easy if they have been slowed a lot) or prepare a counter to stop you from casting it again.
Here is a small example if you start with Rootmaze turn 1 against a Gush deck.
Turn 1: Tapped Mox, Tapped land
Turn 2: Tapped fetch, Scroll for Bounce
Turn 3: Ready to bounce with 0 or 1 mana backup
In the 3 first turns, they will have done nothing towards acheving their game plan and must still use a FoW to keep you from casting it again. Granted the Gush player will most likely get A Recall with the Scroll, but that means he still must spend 4 mana at some time to remove the Rootmaze.
Also, even if Fastbond is in play, Gush in now simply a draw 2 cards and lose 2 life and it's way harder to chain.
I'm not saying it's great, but it is worth trying.