Play Gifs in Unity 3D using System Drawing

AnimatedGifDrawer.cs

/*
Copy the "System.Drawing.dll" file in the "*\Unity\Editor\Data\Mono\lib\mono\2.0" folder into your "Assets" folder. 
2) Attach this script to any object in your scene. 
3) Change the "loadingGifPath" field of the script, (in the Inspector view), to the path of your Gif file. (this can be relative, from the root project folder (i.e. the parent of the "Assets" folder), or absolute
*/
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Imaging;
using UnityEngine;
 
public class AnimatedGifDrawer : MonoBehaviour
{
    public string loadingGifPath;
    public float speed = 1;
    public Vector2 drawPosition;
 
    List<Texture2D> gifFrames = new List<Texture2D>();
    void Awake()
    {
        var gifImage = Image.FromFile(loadingGifPath);
        var dimension = new FrameDimension(gifImage.FrameDimensionsList[0]);
        int frameCount = gifImage.GetFrameCount(dimension);
        for (int i = 0; i < frameCount; i++)
        {
            gifImage.SelectActiveFrame(dimension, i);
            var frame = new Bitmap(gifImage.Width, gifImage.Height);
            System.Drawing.Graphics.FromImage(frame).DrawImage(gifImage, Point.Empty);
            var frameTexture = new Texture2D(frame.Width, frame.Height);
            for (int x = 0; x < frame.Width; x++)
                for (int y = 0; y < frame.Height; y++)
                {
                    System.Drawing.Color sourceColor = frame.GetPixel(x, y);
                    frameTexture.SetPixel(frame.Width - 1 - x, y, new Color32(sourceColor.R, sourceColor.G, sourceColor.B, sourceColor.A)); // for some reason, x is flipped
                }
            frameTexture.Apply();
            gifFrames.Add(frameTexture);
        }
    }
 
    void OnGUI()
    {
        GUI.DrawTexture(new Rect(drawPosition.x, drawPosition.y, gifFrames[0].width, gifFrames[0].height), gifFrames[(int)(Time.frameCount * speed) % gifFrames.Count]);
    }
}