Is there any functionality like lens for Gnome shell? or any modified version of Gnome Shell.
Like unity lens, you can add plugins to search for more specific things:
I was very happy with
In 2 days I was looking for a solution and found more than that: Meet Synapse – the super fast new GNOME Do replacement
To install it, just the commands above:
Talking about the plugin usage, that @Evandro Silva mentioned, it's possible with Sypase too.
P.S.: You can found more information and some snapshots in the website that I mentioned. I took the commands from there.