You are correct! The Google "G" logo is not available in the Flutter Material Icons library.
Using font_awesome_flutter is one option, but if you need an exact match with the correct colors and gradients, you can create the Google logo using CustomPainter.

Solution Using CustomPainter

Instead of relying on an external package, you can draw the Google "G" logo with precise arc rendering and colors.

Example Code:

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'Google logo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      home: GoogleLogo(),
    );
  }
}

class GoogleLogo extends StatelessWidget {
  final double size;
  const GoogleLogo({super.key, this.size = 300});

  @override
  Widget build(BuildContext context) {
    return Container(
      alignment: Alignment.center,
      color: Colors.white,
      child: CustomPaint(painter: GoogleLogoPainter(), size: Size.square(size)),
    );
  }
}

class GoogleLogoPainter extends CustomPainter {
  @override
  bool shouldRepaint(_) => true;

  @override
  void paint(Canvas canvas, Size size) {
    final length = size.width;
    final verticalOffset = (size.height / 2) - (length / 2);
    final bounds = Offset(0, verticalOffset) & Size.square(length);
    final center = bounds.center;
    final arcThickness = size.width / 4.5;
    final paint = Paint()
      ..style = PaintingStyle.stroke
      ..strokeWidth = arcThickness;

    void drawArc(double startAngle, double sweepAngle, Color color) {
      final _paint = paint..color = color;
      canvas.drawArc(bounds, startAngle, sweepAngle, false, _paint);
    }

    drawArc(3.5, 1.9, Colors.red);
    drawArc(2.5, 1.0, Colors.amber);
    drawArc(0.9, 1.6, Colors.green.shade600);
    drawArc(-0.18, 1.1, Colors.blue.shade600);

    canvas.drawRect(
      Rect.fromLTRB(
        center.dx,
        center.dy - (arcThickness / 2),
        bounds.centerRight.dx + (arcThickness / 2) - 4,
        bounds.centerRight.dy + (arcThickness / 2),
      ),
      paint
        ..color = Colors.blue.shade600
        ..style = PaintingStyle.fill
        ..strokeWidth = 0,
    );
  }
}

#### **Code Output:**
[enter image description here][1]


  [1]: https://i.sstatic.net/9QPDzjHK.jpg