Is it possible to use Laravel with CodeIgniter 2.0

I am maintaining a clients website built on CodeIgniter 2. So far I was dealing with the legacy code any how. But client wants to move on a freemium modal where some of his item will be available for a subscription.

So I was thinking to develop this membership and subscription modal on Laravel due to its ease of development. Users profile and downloadable item will be available on app.website.com while original website is on website.com . Basically Laravel app will be on a subdomain. My question is it doable? I mean, I will host Laravel app to a different hosting and is it possible to pass the session data between them to check the status of logged in user?