imagemin-gifsicle 
gifsicle imagemin plugin
Install
$ npm install imagemin-gifsicle
Usage
const imagemin = require('imagemin');
const imageminGifsicle = require('imagemin-gifsicle');
imagemin(['images/*.gif'], 'build/images', {use: [imageminGifsicle()]}).then(() => {
console.log('Images optimized');
});API
imageminGifsicle([options])(buffer)
Returns a promise for a buffer.
options
Type: Object
interlaced
Type: boolean
Default: false
Interlace gif for progressive rendering.
optimizationLevel
Type: number
Default: 1
Select an optimization level between 1 and 3.
The optimization level determines how much optimization is done; higher levels take longer, but may have better results.
- Stores only the changed portion of each image.
- Also uses transparency to shrink the file further.
- Try several optimization methods (usually slower, sometimes better results)
colors
Type: number
Reduce the number of distinct colors in each output GIF to num or less. Num must be between 2 and 256.
buffer
Type: Buffer
Buffer to optimize.
License
MIT © imagemin