Hi all,
Finally I've fixed gtk2 under x11 too (qt/qt5 are fixed 2 days ago), now GetWindowRect() returns correct form size (with frame around) , so now eg poScreenCenter/poWorkAreaCenter (poWorkAreaCenter is also fixed - Screen.WorkAreaRect was same as Screen.DesktopRect because of wrong implementation of SPI_GETWORKAREA) is perfectly centered on screen.
https://bugs.freepascal.org/view.php?id=36897
https://bugs.freepascal.org/view.php?id=36919
Feature can be disabled with -disableaccurateframe.
Please test and send feedback, or open issues about it :)
zeljko
