how connect store producer to webgrid

alter PROCEDURE [dbo].[GroupGallery]
   AS
BEGIN
 
     select ID_GGallery,FGroupGallery ,[dbo].[Groupgallary-get-countpic](ID_GGallery) as countpic,Fpic from groupgalleries
END

@model store producer
@{
    ViewBag.Title = "مدیریت تصاویر";
    <link href="@Url.Content("~/Content/webgrid.css")" rel="stylesheet" type="text/css" media="all" />
    Layout = "~/Areas/admin/Views/Shared/_AdminLayout.cshtml";
    var grid = new WebGrid(
     source: Model,
     defaultSort: "ID_GGallery",
     rowsPerPage: 50,
     canPage: true,
     canSort: true,
     selectionFieldName: "SelectedRow"
     );
    int rowVal = 0;
}