Unity-like Dashboard for Gnome fallback?

Is there any way I can run the Unity dashboard (or something similar, like Bolt for Gnome 3) in Gnome Fallback?

Yes there is. You can run unity-2d-shell , just type Alt+F2 then enter in unity-2d-shell and it will give you the Unity 2d launcher and dashboard. To start it on start-up How to start applications at startup?

Here is a picture of my Gnome fallback (no-effects) session using the unity dash-

Unfortunately the dash is built into the launcher. But you can auto-hide the launcher, and turn down the reveal sensitivity so it be harder to show unless you access the dash.

I found a way to hack it so the launcher does not appear,

1. Open the shell.qml to edit, paste this in terminal

   gksudo gedit /usr/share/unity-2d/shell/Shell.qml

2. Find this code in the file, scroll down a bit-

   LauncherLoader {
           id: launcherLoader
           anchors.top: parent.top
           anchors.bottom: parent.bottom
           width: 65
   

3. Change the width: 65 to width: 1

4. If you had the unity-2d-shell running while making the changes, in terminal do
   killall unity-2d-shell then type Alt+F2 and enter unity-2d-shell to see the change, now the launcher is out of the way, and you can still acess the dash with the Meta (windows) key.