Hi,
As I understand, you want to add web part to search driven content in SharePoint 2013.
Why do you want to upload the web part to search driven content category? Could you please provide more details about the issue?
If you just want to use the web part, you could upload the web part in the Web Part Gallery. You could go to the site setting-> Web Designer Galleries-> web part. It will add the web part to the custom category automatically after you upload the web part.
Best regards,
Sara Fan
Hi,
Search driven content web parts are not available in SharePoint 2013 standard edition. They are only available in SharePoint 2013 enterprise.
The article below is about User License Enforcement in SharePoint 2013.
http://www.titus.com/blog/2012/11/spc-diary-day-4-user-license-enforcement-in-sharepoint-2013/
Best regards,
Sara Fan