diff --git a/nix/hm-module.nix b/nix/hm-module.nix
index b0a6359..21bbc9c 100644
--- a/nix/hm-module.nix
+++ b/nix/hm-module.nix
@@ -21,6 +21,12 @@ in {
       default = {};
       description = "Restray backup profiles.";
     };
+
+    gui = lib.mkOption {
+      type = lib.types.submodule shared.guiOpts;
+      default = {};
+      description = "GUI-only settings, ignored by restray daemon.";
+    };
   };
 
   options.services.restray.enable = lib.mkEnableOption "Restray backup scheduler daemon";
@@ -32,7 +38,7 @@ in {
 
     (lib.mkIf cfg.enable {
       home.packages = [cfg.package];
-      home.file."${configDir}/config.toml".source = shared.configFile cfg.profiles;
+      home.file."${configDir}/config.toml".source = shared.configFile cfg.profiles cfg.gui;
     })
 
     (lib.mkIf (daemon.enable && cfg.enable) {
diff --git a/nix/nixos-module.nix b/nix/nixos-module.nix
index f18eb50..78e9ac0 100644
--- a/nix/nixos-module.nix
+++ b/nix/nixos-module.nix
@@ -16,6 +16,12 @@ in {
       default = {};
       description = "Restray backup profiles.";
     };
+
+    gui = lib.mkOption {
+      type = lib.types.submodule shared.guiOpts;
+      default = {};
+      description = "GUI-only settings, ignored by restray daemon.";
+    };
   };
 
   config = lib.mkIf cfg.enable {
@@ -43,6 +49,6 @@ in {
       };
     };
 
-    environment.etc."restray/config.toml".source = shared.configFile cfg.profiles;
+    environment.etc."restray/config.toml".source = shared.configFile cfg.profiles cfg.gui;
   };
 }
diff --git a/nix/shared.nix b/nix/shared.nix
index 392765e..cef77fe 100644
--- a/nix/shared.nix
+++ b/nix/shared.nix
@@ -2,6 +2,41 @@
   lib,
   pkgs,
 }: let
+  guiOpts = {
+    options = {
+      checkUpdates = lib.mkOption {
+        type = lib.types.bool;
+        default = true;
+        description = "MacOS/Windows only. Check for new Restray versions on startup and periodically. When an update is found, the version item in the menu changes to an update button";
+      };
+      manageRestic = lib.mkOption {
+        type = lib.types.bool;
+        default = false;
+        description = "Windows only. If restic is not found in PATH, automatically downloads and updates a self-managed restic binary daily from GitHub.";
+      };
+      notifications = lib.mkOption {
+        type = lib.types.str;
+        default = "none";
+        description = ''"all" (success + errors), "errors" (errors only), or "none" (silent)'';
+      };
+      icon = lib.mkOption {
+        type = lib.types.str;
+        default = "";
+        description = ''"color", "mono", "white", or "black". Default is "mono" on MacOS/Windows and "color" elsewhere. "mono" follows OS light/dark mode.'';
+      };
+      scheduleDisplay = lib.mkOption {
+        type = lib.types.str;
+        default = "description";
+        description = ''"description" (human-readable, e.g. "every 6 hours"), "cron" (raw expression, e.g. "0 * * * *"), "last" (time since last backup, e.g. "2 hours ago"), or "none"'';
+      };
+      terminal = lib.mkOption {
+        type = lib.types.str;
+        default = "";
+        description = ''Terminal emulator used in "Shell" and "View Log". If unset, MacOS will use Terminal.app. Linux will use default. Not used on Windows. e.g. "Ghostty"'';
+      };
+    };
+  };
+
   profileOpts = {name, ...}: {
     options = {
       name = lib.mkOption {
@@ -140,12 +175,23 @@
       mount.args = prof.mount.args;
     };
 
+  guiToToml = gui:
+    lib.filterAttrsRecursive (_: v: v != null && v != [] && v != "") {
+      check_updates = gui.checkUpdates;
+      manage_restic = gui.manageRestic;
+      notifications = gui.notifications;
+      icon = gui.icon;
+      schedule_display = gui.scheduleDisplay;
+      terminal = gui.terminal;
+    };
+
   toml = pkgs.formats.toml {};
 
-  configFile = profiles:
+  configFile = profiles: gui:
     toml.generate "restray-config.toml" {
       profiles = lib.mapAttrsToList profileToToml profiles;
+      gui = guiToToml gui;
     };
 in {
-  inherit profileOpts configFile;
+  inherit profileOpts guiOpts configFile;
 }