Hi ferikunnn@, can you add a few more steps?  I tried the following and I see an animated gif.

1) Search for 'gif' on google search
2) tap images, and tap first result (mine happens to be a Star Wars BB-8 animated gif https://media.giphy.com/media/9fbYYzdf6BbQA/giphy.gif)
3) long press image, tap 'Save Image'
4) Dismiss chrome and choose the Messages app from Springboard.
5) Tap the image icon and select the bb-8 image (not it doesn't animate in the photo grid)
6) Tap send

Results: The bb-8 image animates inside the Messages app, it's still a gif.

I can't repro either, tried sending out Saved images using iMessage and i see the animation when tapping on the Image.
ferikunn@ Please provide the the URL of gif image you are having issues with, also iOS version you are using. Note that GIF's will not animate in Camera Roll.

This may be a duplicate of  crbug.com/634975 .  (See #26).

Please post a link to a relevant gif.  Thanks!

I think it is a duplicate of  crbug.com/690355 .
I think the application used to get the saved image is not "Photos". In that case, if the application uses the image extension to determine the image type, it might think the GIF is a PNG. Photos does not relies on the image extension to get the image type so it probably not be possible to repro with it.
srikanthg@ do you think you can test this behavior?

gambard@ am not clear what you are asking me to test here.
I can see the downloaded gif's from Chrome are animating fine in apps like GifBook, iMessage.

srikanthg@: I think the problem was with application that would replace Photos by letting you access to all the photos/images of your device (for example GifBook is only letting you access the GIF in your device, such an application would let you access all your photos). I don't know if such an application exists.
The idea would be to share a GIF to iMessage from this application instead of Photos.
Please note that this bug has been fixed in the latest version of M57. You can test in M56.