First, Gtm plugins will likely never be released to the public. If we do, chances are even with copyrighting, it will simply be to hard to stop everyone from stealing and using our plugins. Second, plugins can only be added to spigot or bukkit servers. You can find a lot of good tutorials and information on this on the internet.
Do avoid having messages or posts that are very very short and should be kept to yourself. Read the rules please.