Solved - gulp error cannot find module laravel-elixir
If you also find error like "laravel-elixir not found" on gulp then you can install laravel-elixir npm package manually. I also fetch this error when i was new in laravel and working with gulp first time.
We can solve laravel-elixir not found error using laravel-elixir nodejs package. So you can run just bellow command and check. First command if you run already then don't require to run.
npm install laravel-elixir