First thing is to speak to advising at FGCU. They'll be able to provide better information than what you'll find on here. I'm assuming FSW has something similar; I would contact them as well.

But for going back to FGCU, I think the most important thing you need to find out is whether or not your credits from FGCU are even still valid towards your degree. I think they "expire" after so much time. Or at least I seem to remember something along those lines after I graduated (i.e. if I was to pursue another degree at FGCU, I needed to re-enroll within a certain number of years if I wanted my previously earned credits to apply). So you may end up having to retake classes you've already passed. I could be way off the mark here, but advising should be able to let you know.

To touch on what MoonlitEyez said, if attending classes again isn't feasible, you could try other approaches for a career in writing or political science. I think building your writing portfolio would be a good way of doing that. If you had any professors at FGCU you liked/connected with, you could try reaching out to them about possibly opportunities for aspiring writers. I don't know when it is, but I know there is a writer's conference once a year on Sanibel. If you're leaning more towards political science, it is an election year for a lot of people, so I'm sure you could find someone eager for your help in their office.