Hi,
I can do that, I'm not entirely sure if I can deliver the result in a day, but with the method I'm thinking at it should be somewhere around that. I assume you have the gifs in a zip file and you want them like that.
Important!
Once reducing the size, the quality of the gif will also be affected OR the length, whichever damage you find suitable for what you need them for.
About me: I'm new here, I'm trying to build up a reputation as a non indian / non bot / non script user and offer quality comprehensive services for a low price compared to the market, prices are never final and can be discussed over PM.