ldc-gen-game-web/app/Http/Controllers/GainsController.php

<?php

namespace App\Http\Controllers;

class GainsController extends Controller
{
    /**
     * index
     * @return \Illuminate\View\View
     */
    public function index()
    {
        if (view()->exists('front.basic.gains')) {
            return view('front.basic.gains');
        }
        return redirect()->route('home');
    }
}