I'm writing some gnuplot scripts and to my surprise gedit does not have any syntax highlighting for it. It would be nice to have it in gedit.

thanks for this great tool!

I know the question was asked 3 years ago, but this is one of the first
entry we found when we look at "gnuplot + gedit" on google, so I figured
it would be nice to give an answer.

Gedit uses gtksourceview <https://wiki.gnome.org/Projects/GtkSourceView>
to highlight codes. The file it uses is just an XML file that can be
created or downloaded if it exists.
You'll find a number of language definitions on the Gnome wiki
<https://wiki.gnome.org/Projects/GtkSourceView/LanguageDefinitions>,
including one for gnuplot.

Now, to install the gnuplot style sheet, download the XML file first:
gnuplot.lang
<https://wiki.gnome.org/Projects/GtkSourceView/LanguageDefinitions?action=AttachFile&do=get&target=gnuplot.lang>

Second, copy it into the directory that holds style sheets for all the
supported languages:

|sudo cp gnuplot.lang /usr/share/gtksourceview-3.0/language-specs/
sudo chmod 644 /usr/share/gtksourceview-3.0/language-specs/gnuplot.lang
|

Now restart gedit and you should be able to choose gnuplot highlighting.