diff --git a/changelog/62377.fixed b/changelog/62377.fixed
new file mode 100644
index 00000000000..1a4bef889cb
--- /dev/null
+++ b/changelog/62377.fixed
@@ -0,0 +1 @@
+Fix groups with duplicate GIDs are not returned by get_group_list
diff --git a/salt/modules/groupadd.py b/salt/modules/groupadd.py
index cb325eea1b2..a18cc1df9bc 100644
--- a/salt/modules/groupadd.py
+++ b/salt/modules/groupadd.py
@@ -40,8 +40,10 @@ def __virtual__():
     )
 
 
-def add(name, gid=None, system=False, root=None):
+def add(name, gid=None, system=False, root=None, non_unique=False):
     """
+    .. versionchanged:: 3006.0
+
     Add the specified group
 
     name
@@ -56,6 +58,11 @@ def add(name, gid=None, system=False, root=None):
     root
         Directory to chroot into
 
+    non_unique
+        Allow creating groups with duplicate (non-unique) GIDs
+
+        .. versionchanged:: 3006.0
+
     CLI Example:
 
     .. code-block:: bash
@@ -67,6 +74,8 @@ def add(name, gid=None, system=False, root=None):
         cmd.append("-g {}".format(gid))
     if system and __grains__["kernel"] != "OpenBSD":
         cmd.append("-r")
+    if non_unique:
+        cmd.append("-o")
 
     if root is not None:
         cmd.extend(("-R", root))
diff --git a/tests/support/pytest/helpers.py b/tests/support/pytest/helpers.py
index 0b8cef7f33d..4b52e0cedad 100644
--- a/tests/support/pytest/helpers.py
+++ b/tests/support/pytest/helpers.py
@@ -214,7 +214,9 @@ class TestGroup:
     def __enter__(self):
         group = self.sminion.functions.group.info(self.name)
         if not group:
-            ret = self.sminion.functions.group.add(self.name, gid=self.gid)
+            ret = self.sminion.functions.group.add(
+                self.name, gid=self.gid, non_unique=True
+            )
             assert ret
             self._delete_group = True
             log.debug("Created system group: %s", self)