membership log-in and tracking system

Can we do the following with a combination of Gravity Forms and the new User Registration Add-On?

The town wants a membership log-in and tracking system.

This is a municipally administered program. We simply want to collect certain member data, and then track their progress through our program. Members will be instructed and supported online (only via email and phone and tooltips on hidden pages), and will be completing much of their tasks offline.

They will log back onto the site on various days, answer some questions and check a box saying they have completed a certain step, and then that information will go into our database and also generate an email notification to the site owners. There will also be a voting system that assigns points as part of our program, and we will need users to be logged in, in order to participate in the voting.

It is duplicate. How can I do the following:
let users register -> complete a form -> let people login later and continue to fill the same form from where they left -> collect info from this user
Is it requires any hacking or available out of the box.
I do have dev. license.
Thanks

What if I have multiple forms? And let people to skip submitted forms.

I'm not sure gravity forms can help me, but with all the brilliant people on this forum I'm hoping maybe someone would be able to point me in the right direction to get the result I need.

I have a lengthy application form where many questions require some thought, so it could take someone 45 min or so to complete, the application is for executive and high level professionals who don't necessarily have that kind of time all in one chunk to do this and also may not have much comfort level with technology and doing this kind of thing themselves - what I need to do is figure out how I could create a page that would allow them to enter this information and answer the questions as they have time and be able to see their previous answers - so basically they have created somewhat of a profile page with their information.

Does anyone have any idea what the best way to do this would be? or is there someone available for hire here that could help me.

Thank you so much for your time and any input you could provide.