A common and useful feature of a variety of text editors / IDEs is to 'find in multiple files'.

A variety of command line tools are available which do this, like grep / ack-grep / etc.

For novice users...
 1. opening a terminal, 
 2. Navigating to the correct directory
 3. grepping for the right pattern
 4. piping that output to cause gedit to open the matched files
... is a little tricky.


Suggestion:
Consider adding a 'multiple files' function, which might be as simple as piping output of ack-grep or similar to a UI control.

Importantly, it should be easy to:
 1. See the matched text (file, line, position).
 2. Open an individual file in gedit with a minimal interaction (click).
 3. Open all of the matched files in gedit (select all, right click, context menu, open all).