Added Display Manager so I half to deal with less.

modules/system/default.nix

@@ -2,6 +2,7 @@
   imports = [
     ./boot.nix
     ./cli.nix
+    ./displaymanager.nix
     ./flatpak.nix
     ./fonts.nix
     ./gtk.nix

modules/system/displaymanager.nix

@@ -0,0 +1,27 @@
+{ config, lib, pkgs, ... }:
+let
+  cfg = config.systems.displaymanager;
+  graphical = config.this.graphical;
+in with lib; {
+  options = {
+    systems.displaymanager = {
+      enable = mkOption {
+        default = graphical.enable;
+        type = with types; bool;
+      };
+    };
+  };
+
+  config = mkIf cfg.enable {
+    services.xserver = {
+      enable = true;
+      displayManager = {
+        autoLogin = {
+          enable = true;
+          user = "james";
+        };
+        gdm.enable = true;
+      };
+    };
+  };
+}