Download-extract and put "Greek.xml" to C:Program files/Mato Technologies/X GXT Editor V.2.2/LangsDownload:https://rapidshare.com/files/3462248771/Greek_Language_for_X_GXT_Editor_V2.2.rarorwww.megaupload.com/?d=ZX5008X8
Thank you for trying to make tool better :)
Added your file to pageLink