How To Crop A Gif
w Did you cut the gif into shapes?
You can do this by masking the mask to your liking or using a clipping mask. Check out how both of them work, but you'll need to because there's no way to create an image other than square / reload. You need to master the shape by making the external elements around the shape transparent.
Caution: GIF format makes translucent mint pixels completely opaque, not translucent like png24. Unfortunately, PNG format does not support animation. So even though this format looks beautiful to you, if you work on it on PS, you will get a very bad result.