i have made my own map and it is live on the server, i didnt put the server IP, ports or that in so i would worry about that to much, seems to be done locally by Gportal.
My uderstanding is that you need to asign thhe grid to be a spwan region,by makong it a home regionand then you can place as many island in that grid for them to be either freeports or lawless, i havent done a lot of testin with this.
map change settings reset charcters and we cant do individual server settings. I have put ot to the Gportal devs maybe you could do the same
For my disco i did 100 xp for non quest items, and then scaled it for the power stone disco but not 100% sure how it effects max XP but i image it allows players to go past the cap set on the server.