How to use gridview.builder for navigation code example

Example: gridview builder

body: GridView.builder(
  itemCount: data.length,
  gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
      crossAxisCount: (orientation == Orientation.portrait) ? 2 : 3),
  itemBuilder: (BuildContext context, int index) {
    return new Card(
      child: new GridTile(
        footer: new Text(data[index]['name']),
        child: new Text(data[index]
            ['image']), //just for testing, will fill with image later
      ),
    );
  },
),