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      <p style="margin: 1.2em 0px ! important;">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.</p>
      <p style="margin: 1.2em 0px ! important;">Gedit uses <a
          href="https://wiki.gnome.org/Projects/GtkSourceView">gtksourceview</a>
        to highlight codes. The file it uses is just an XML file that
        can be created or downloaded if it exists.<br>
        You’ll find a number of language definitions on the <a
          href="https://wiki.gnome.org/Projects/GtkSourceView/LanguageDefinitions">Gnome
          wiki</a>, including one for gnuplot.</p>
      <p style="margin: 1.2em 0px ! important;">Now, to install the
        gnuplot style sheet, download the XML file first: <a
href="https://wiki.gnome.org/Projects/GtkSourceView/LanguageDefinitions?action=AttachFile&do=get&target=gnuplot.lang">gnuplot.lang</a></p>
      <p style="margin: 1.2em 0px ! important;">Second, copy it into the
        directory that holds style sheets for all the supported
        languages:</p>
      <pre style="font-size: 0.85em; font-family: Consolas,Inconsolata,Courier,monospace;font-size: 1em; line-height: 1.2em;margin: 1.2em 0px;"><code style="font-size: 0.85em; font-family: Consolas,Inconsolata,Courier,monospace;margin: 0px 0.15em; padding: 0px 0.3em; white-space: pre-wrap; border: 1px solid rgb(234, 234, 234); background-color: rgb(248, 248, 248); border-radius: 3px 3px 3px 3px; display: inline;white-space: pre; overflow: auto; border-radius: 3px 3px 3px 3px; border: 1px solid rgb(204, 204, 204); padding: 0.5em 0.7em; display: block ! important;display: block; padding: 0.5em; color: rgb(51, 51, 51); background: none repeat scroll 0% 0% rgb(248, 248, 255);">sudo cp gnuplot.lang /usr/share/gtksourceview-3.0/language-specs/
sudo chmod 644 /usr/share/gtksourceview-3.0/language-specs/gnuplot.lang
</code></pre>
      <p style="margin: 1.2em 0px ! important;">Now restart gedit and
        you should be able to choose gnuplot highlighting.</p>
      <div
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        IHRvIGNob29zZSBnbnVwbG90IGhpZ2hsaWdodGluZy48YnI+"
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