I came up with this, and it works
<gel:script
xmlns:core="jelly:core"
xmlns:util="jelly:util"
xmlns:gel="jelly:com.niku.union.gel.GELTagLibrary"
xmlns:file="jelly:com.niku.union.gel.FileTagLibrary">
<!-- Set the path to the file share -->
<gel:parameter var="vFileName" default="/fs0/clarity1/share/Hello_World.txt"/>
<!-- Create an output file named Hello_World.txt -->
<file:writeFile fileName="${vFileName}" >
<file:line>
<file:column value="A row of data for the out put file"></file:column>
</file:line>
<!-- Close the output file -->
</file:writeFile>
</gel:script>