A sample Gulpfile for use with any Go HTTP server to automatically recompile the Go binary when any file changes.Adjust the projectName and srcDir to match your project's layout. Tested on Linux (Ubuntu) but should work wherever "sh" is available.

Gulpfile.js

var projectName = 'main',
    srcDir = './src',
    gulp = require('gulp'),
    exec = require('gulp-exec');

gulp.task('serve', function() {

  var opts = { continueOnError: true, pipeStdout: true },
      goCmd = 'sh -c "go run ' + __dirname + '/src/*.go&"',
      killCmd = 'killall -q go ' + projectName;

  gulp.src(srcDir + '/**/*.go')
      .pipe(exec(killCmd, opts))
      .pipe(exec(goCmd, opts));

});

gulp.task('watch', function() {
  gulp.watch('./**/*.go', ['serve']);
});

gulp.task('default', ['serve', 'watch']);