Gulp runs in the node environment, so you can just use node's module loader to import the data within arrayfile, then export it as an array for your Gulp script to import.
arrayfile.js:
module.exports = {
somefile: require('./somefile'),
someotherfile: require('./someotherfile')
};
gulpfile.js:
var data = require('./arrayfile');
console.log(data.somefile);
console.log(data.someotherfile);
You could export an array from arrayfile.js (the name of which obviously doesn't make much sense when you export an object), however having named properties to access a different file's data feels a little more elegant, and is better for readability.