[–] Maximus_Dinduicus 0 points 0 points (+0|-0) ago 

Gifs are images, stands for graphics interchange format. Owned by CompuServe.

Or did you mean the GUID name?

[–] HyperbolicGasChamber [S] 0 points 0 points (+0|-0) ago 

I'm talking about the whole thing before ".gif" of course.

[–] Maximus_Dinduicus 0 points 1 points (+1|-0) ago 

That has nothing to do with a file format and is likely a GUID so it reduces the chances of any other file ever having the same name.