The GTK_THEME variable is recognized by Gtk 3. For Gtk 2 you need to set GTK2_RC_FILES to the gtkrc file for the theme you want. Your Gedit is build using Gtk 3. Lazarus is typically build on Linux using Gtk 2.
See also: https://wiki.archlinux.org/index.php/GTK+#Themes
-- _______________________________________________ lazarus mailing list lazarus@lists.lazarus-ide.org https://lists.lazarus-ide.org/listinfo/lazarus