Using webpack with gulp is as easy as using the node.js API.
var gulp = require('gulp');
var webpack = require('webpack-stream');
gulp.task('default', function() {
  return gulp.src('src/entry.js')
    .pipe(webpack())
    .pipe(gulp.dest('dist/'));
});
The above will compile src/entry.js into assets with webpack into dist/ with the output filename of «hash».js (a webpack-generated hash of the build).
Or just pass in your webpack.config.js:
return gulp.src('src/entry.js')
  .pipe(webpack( require('./webpack.config.js') ))
  .pipe(gulp.dest('dist/'));
See webpack-stream for more options and details.
webpack-stream
var gulp = require("gulp");
var gutil = require("gulp-util");
var webpack = require("webpack");
var WebpackDevServer = require("webpack-dev-server");
gulp.task("webpack", function(callback) {
    // run webpack
    webpack({
        // configuration
    }, function(err, stats) {
        if(err) throw new gutil.PluginError("webpack", err);
        gutil.log("[webpack]", stats.toString({
            // output options
        }));
        callback();
    });
});
Don’t be too lazy to integrate the
webpack-dev-serverinto your development process. It’s an important tool for productivity.
gulp.task("webpack-dev-server", function(callback) {
    // Start a webpack-dev-server
    var compiler = webpack({
        // configuration
    });
    new WebpackDevServer(compiler, {
        // server and middleware options
    }).listen(8080, "localhost", function(err) {
        if(err) throw new gutil.PluginError("webpack-dev-server", err);
        // Server listening
        gutil.log("[webpack-dev-server]", "http://localhost:8080/webpack-dev-server/index.html");
        // keep the server alive or continue?
        // callback();
    });
});
Take a look at an example gulpfile. It covers three modes:
    © 2012–2015 Tobias Koppers
Licensed under the MIT License.
    https://webpack.github.io/docs/usage-with-gulp.html