Hey, I was wondering if back when there was no "Creative Gamemode" there were plugins who had a "build inventory". I was searching one, but couldn't find any. Basically a Plugin that has a command which opens an inventory with a bunch of blocks for building...so I dont have to give real gamemode to people anymore
What you are asking is just a complicated way to say Gamemode... and a little advise... dont give GM to your members...
There was a plugin called Limited Creative. Don't know if it worked or if it's up-to-date, but check it out.