@@ -587,6 +587,9 @@ always available.
       * - .. attribute:: flags.warn_default_encoding
         - :option:`-X warn_default_encoding <-X>`
 
+      * - .. attribute:: flags.gil
+        - :option:`-X gil <-X>`
+
    .. versionchanged:: 3.2
       Added ``quiet`` attribute for the new :option:`-q` flag.
 
@@ -613,6 +616,9 @@ always available.
    .. versionchanged:: 3.11
       Added the ``int_max_str_digits`` attribute.
 
+   .. versionchanged:: 3.13
+      Added the ``gil`` attribute.
+
 
 .. data:: float_info
 
 
@@ -803,7 +803,8 @@ def test_sys_flags(self):
                  "dont_write_bytecode", "no_user_site", "no_site",
                  "ignore_environment", "verbose", "bytes_warning", "quiet",
                  "hash_randomization", "isolated", "dev_mode", "utf8_mode",
-                 "warn_default_encoding", "safe_path", "int_max_str_digits")
+                 "warn_default_encoding", "safe_path", "int_max_str_digits",
+                 "gil")
         for attr in attrs:
             self.assertTrue(hasattr(sys.flags, attr), attr)
             attr_type = bool if attr in ("dev_mode", "safe_path") else int
 
@@ -0,0 +1,2 @@
+Include :attr:`sys.flags.gil` as part of the sequence when :data:`sys.flags`
+is treated as a tuple.
@@ -3124,7 +3124,7 @@ static PyStructSequence_Desc flags_desc = {
     "sys.flags",        /* name */
     flags__doc__,       /* doc */
     flags_fields,       /* fields */
-    18
+    sizeof(flags_fields) / sizeof(flags_fields[0]) - 1
 };
 
 static int
Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	+Include :attr:`sys.flags.gil` as part of the sequence when :data:`sys.flags`
	`2`	`+is treated as a tuple.`