Recently I discovered a Unity-compatible library that allows exporting Unity textures into animated GIFs. This library is extremely easy to use and platform independent. It is called GifEncoder, which is based on NGif, an older C# based project for encoding GIFs.

To use it, just copy the GifEncoder folder to your Assets directory, point a camera at what you would like to record, and in each frame send the pixels from the camera’s render target to the encoder:

public void Update()
   renderCamera.Render(); = renderTexture;
   var frameTexture = new Texture2D(renderTexture.width, renderTexture.height, TextureFormat.RGB24, false);
   frameTexture.ReadPixels(new Rect(0, 0, renderTexture.width, renderTexture.height), 0, 0);

In this example, renderCamera is a public field, and the camera should be assigned to it, renderTexture is a temporary RenderTexture that the camera renders into, and gifEncoder is the encoder object. These are initialized as below:

public void Start()
   renderTexture = new RenderTexture(800, 480, 24); //GIF Resolution
   renderCamera.enabled = false;
   renderCamera.targetTexture = renderTexture;
   gifEncoder = new AnimatedGifEncoder(@"C:\Gifs\MyGif.gif");
   gifEncoder.SetDelay(1000 / 30);