CM WebClient has a new template for you to export your data from the Grid, it just uses the control template GridPDFExport.ctrl. The only requirement for using it is to put "grid=" in the Control Name for the button using the template. The value you use for this entry is the Control Name of the Grid you want to export.
To do all this follow these next steps:
1. In Plex create a button to export data to PDF Grid:
2. In Plex format the Control Name, for example:
3. An example should be similar to this: