diff --git a/app/services/cwmp/main_state_machine.ts b/app/services/cwmp/main_state_machine.ts
index eab9155..f4bf9f3 100644
--- a/app/services/cwmp/main_state_machine.ts
+++ b/app/services/cwmp/main_state_machine.ts
@@ -130,7 +130,21 @@ class DiscoveringParametersState extends DeviceState {
       return { nextState: new CriticalReadsState(), response: '' }
     }
 
-    // Process response and continue
+    // GPN success — process the response
+    if (context.message?.success && context.message.data) {
+      try {
+        context.device.organizeParameters(context.message.data, new Date())
+        context.device.setGpnStatus('supported')
+        logger.info(
+          { deviceId: context.device.identifier, paramCount: context.device.getParameters().length },
+          '[DiscoveringParameters] GPN response processed'
+        )
+      } catch (e: any) {
+        logger.error({ error: e?.message }, '[DiscoveringParameters] Error processing GPN response')
+      }
+    }
+
+    // Continue with next path in queue if any
     if (this.parameterQueue.length > 0) {
       return { response: await this.processNext(context) }
     }