Go to gwapps.com and open the Contact Us page. Use the form there to request a free trial and we will contact you shortly afterwards.
Just go to the Home page and review the articles in the Getting Started and Tutorial topics.
All applications in GWApps deploy when they are created. There is no separate deployment step.
If you want to have a review step where IT gets to approve the application before is it “deployed” to the users, you can implement this via application security. As a user does not see an application they have not been given access to, deployment really just becomes giving users access to the application. Using this approach you would have a policy that new applications should be created with just the developers and a defined list of IT users having access. Once the IT staff have signed off on the application, the real users are added to the application.