diff --git a/src/aiida_sssp_workflow/workflows/convergence/_base.py b/src/aiida_sssp_workflow/workflows/convergence/_base.py
index c179ea3..1d4eec8 100644
--- a/src/aiida_sssp_workflow/workflows/convergence/_base.py
+++ b/src/aiida_sssp_workflow/workflows/convergence/_base.py
@@ -46,7 +46,7 @@ def __get__(self, obj, type):
 
 def is_valid_convergence_configuration(value, _=None):
     """Check if the configuration is valid"""
-    valid_configurations = UNARIE_CONFIGURATIONS
+    valid_configurations = UNARIE_CONFIGURATIONS + ["GS"]
     if value not in valid_configurations:
         return f"Configuration {value} is not valid. Valid configurations are {valid_configurations}"