"How to install additional plugins
While Gedit ships with a set of default plugins, you can surely add
as many as you like. To install a plugin for Gedit, you must first
download it to a local folder and then extract the contents to
'~/.gnome2/gedit/plugins/' directory. Also look for a package named
"gedit-plugins" in your distribution’s package manager, this
package contains some additional plugins for gedit. Once you have
installed the plugin you want, you need to enable it via
Edit>Preferences and then the Plugins Tab.
"And finally here is a list of the top plugins you should
definitely check out if you do a lot of text editing:
"Lets you arrange blocks of text into columns easily and
quickly. Just select the text to be arranged, go to Edit >
Align, specify the column separator and presto you have instant
columns. No more pressing tabs and arranging text manually!"