Ok i removed the immediate ghostmode enable/disable, because disable didnt work (no way to disable it for script) and enable was only a bad solution, too (if you recognized.. if it was enabled you couldn't disable it with /ghostmode command afterwards anymore for this round).
So you'll have to both /ghostmode and /mapset
In favor i added some short names for settings: gm for ghostmode, rsp for respawn, rst for respawntime, dur for duration.