Image upload to gallery & reader subscription to view gallery

Hi. We are using Joomla 3 for our desktop newspaper website (www.rustenburgherald.co.za). I need to ask a question regarding the flash flipbook that we have on our desktop site (which contains the pages of the latest newspaper): 
Someone wrote the code for us to be able to only let registered and subscribed users read the latest newspaper in that flipbook. Will there be a way with Mobile Joomla to only let registered users (and who have paid a subscription fee) be able to browse through the gallery with the images of the latest newspaper? Also, can the images be uploaded to a gallery manually by browsing for it on my computer or, even better, via our Filezilla database? I'm new to building a mobile app, so excuse if I ask obvious questions.

I guess there should be many gallery components with per user group restrictions, but I'm not familiar with joomla's gallery extensions and cannot recommend what would be the best for your case.