That's kind of a yes and no.
If you look in your plugins, you'll see a form plugin called 'subscriptions'. That's what we use for our subscription system on this site. It's basically the PayPal form plugin, much modified to handle the invoicing, recurring subs, etc.
It'll work as-is (I think), but very much tailored to how we do our subscriptions, and you'd probably have to read through the code for hints and tips on setting your site up.
We decided to include it in github, essentially as a guide / starting point for any advanced users who want to implement their own.
However, it's not something we would provide support for automatically as part of a support sub here. If you needed help getting it implemented on your site, that's have to be done as a custom job.
-- hugh