diff --git a/src/App/GroupExtension.pyi b/src/App/GroupExtension.pyi
index cef2617867..8d50bc416b 100644
--- a/src/App/GroupExtension.pyi
+++ b/src/App/GroupExtension.pyi
@@ -70,3 +70,9 @@ class GroupExtension(DocumentObjectExtension):
         @param recursive  if true check also if the obj is child of some sub group (default is false).
         """
         ...
+
+    def allowObject(self, obj: Any) -> bool:
+        """
+        Returns true if obj is allowed in the group extension.
+        """
+        ...
diff --git a/src/App/GroupExtensionPyImp.cpp b/src/App/GroupExtensionPyImp.cpp
index a13fbd7f65..fc281215d8 100644
--- a/src/App/GroupExtensionPyImp.cpp
+++ b/src/App/GroupExtensionPyImp.cpp
@@ -318,3 +318,30 @@ int GroupExtensionPy::setCustomAttributes(const char* /*attr*/, PyObject* /*obj*
 {
     return 0;
 }
+
+// def allowObject(self, obj: Any) -> bool:
+PyObject* GroupExtensionPy::allowObject(PyObject* args)
+{
+    PyObject* object;
+    if (!PyArg_ParseTuple(args, "O!", &(DocumentObjectPy::Type), &object)) {
+        return nullptr;
+    }
+
+    auto* docObj = static_cast<DocumentObjectPy*>(object);
+    if (!docObj->getDocumentObjectPtr()
+        || !docObj->getDocumentObjectPtr()->isAttachedToDocument()) {
+        PyErr_SetString(Base::PyExc_FC_GeneralError, "Cannot check an invalid object");
+        return nullptr;
+    }
+    if (docObj->getDocumentObjectPtr()->getDocument()
+        != getGroupExtensionPtr()->getExtendedObject()->getDocument()) {
+        PyErr_SetString(Base::PyExc_FC_GeneralError,
+                        "Cannot check an object from another document from this group");
+        return nullptr;
+    }
+
+    GroupExtension* grp = getGroupExtensionPtr();
+
+    bool allowed = grp->allowObject(docObj->getDocumentObjectPtr());
+    return PyBool_FromLong(allowed ? 1 : 0);
+}