我可以在GridView中插入一行吗？

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(title: Text('GridView Example')),
        body: MyGridView(),
      ),
    );
  }
}

class MyGridView extends StatefulWidget {
  @override
  _MyGridViewState createState() => _MyGridViewState();
}

class _MyGridViewState extends State<MyGridView> {
  List<String> items = ['Item 1', 'Item 2', 'Item 3'];

  @override
  Widget build(BuildContext context) {
    return GridView.builder(
      itemCount: items.length,
      gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
        crossAxisCount: 3,
        crossAxisSpacing: 10,
        mainAxisSpacing: 10,
      ),
      itemBuilder: (context, index) {
        return GestureDetector(
          onTap: () {
            setState(() {
              items.insert(index, 'New Item');
            });
          },
          child: Card(
            child: Text(items[index]),
          ),
        );
      },
    );
  }
}