This app was mentioned in
with an average of
quick search showed me this. I'm pretty confident that this app works on your phone.
Also imgur has a video2gif mode so you won't really need that :)
I use Gif Me!: [link]
Works well, also [link] fast burst camera takes like, 30 pictures a second you can then make into a gif, and also drop down, once taken, to 2 or 3 frames a second or somewhere in between.
Also works well.
Wat about "Gif Me!"
Maybe this? [link]