Panama City Marina allows liveaboards. Not sure what you are looking for in the way of amenities, but if you are looking for a "resort type" marina, this ain't it. No pool, no clubhouse, no tennis courts or golf course, no on site bar or restaraunt. On the other hand, if you are looking for a well kept, well protected, professionally operated marina with EZ access to public transportation, 24 hour
security,
fuel,
pump out, small marina store, walking distance to downtown panama city, lots of parking, and so on, here it is. All it lacks is charm. And as a practical matter, Panama City is about as close as you can get in driving time to Atlanta.