The GridView control is not present in Sitefinity 5.1. In order to include a GridView control in your SItefinity project, you can follow the simple steps from here
, and then use it to feed XML content.
the Telerik team
Do you want to have your say in the Sitefinity development roadmap? Do you want to know when a feature you requested is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items