diff --git a/stubs/rx/concurrency/mainloopscheduler/gtkscheduler.pyi b/stubs/rx/concurrency/mainloopscheduler/gtkscheduler.pyi
new file mode 100644
--- /dev/null
+++ b/stubs/rx/concurrency/mainloopscheduler/gtkscheduler.pyi
@@ -0,0 +1,12 @@
+# Stubs for rx.concurrency.mainloopscheduler.gtkscheduler (Python 3)
+#
+# NOTE: This dynamically typed stub was automatically generated by stubgen.
+
+from rx.concurrency.schedulerbase import SchedulerBase
+from typing import Any, Optional
+
+class GtkScheduler(SchedulerBase):
+    def schedule(self, action: Any, state: Optional[Any] = ...): ...
+    def schedule_relative(self, duetime: Any, action: Any, state: Optional[Any] = ...): ...
+    def schedule_absolute(self, duetime: Any, action: Any, state: Optional[Any] = ...): ...
+    def schedule_periodic(self, period: Any, action: Any, state: Optional[Any] = ...): ...