diff --git a/litellm/llms/gpustack/rerank/transformation.py b/litellm/llms/gpustack/rerank/transformation.py
index 56f79379278..6686c7b77c9 100644
--- a/litellm/llms/gpustack/rerank/transformation.py
+++ b/litellm/llms/gpustack/rerank/transformation.py
@@ -116,9 +116,9 @@ class GPUStackRerankConfig(BaseRerankConfig):
         model_response: RerankResponse,
         logging_obj: object,
         api_key: str | None = None,
-        request_data: dict[str, object] = {},
-        optional_params: dict[str, object] = {},
-        litellm_params: dict[str, object] = {},
+        request_data: dict[str, object] | None = None,
+        optional_params: dict[str, object] | None = None,
+        litellm_params: dict[str, object] | None = None,
     ) -> RerankResponse:
         response_json: Final = TypeAdapter(GPUStackRerankResponsePayload).validate_json(raw_response.content)
         total_tokens: Final = response_json.usage.total_tokens or 0
diff --git a/litellm/utils.py b/litellm/utils.py
index 24792a45756..a1f79d7f69d 100644
--- a/litellm/utils.py
+++ b/litellm/utils.py
@@ -8181,10 +8181,15 @@ class ProviderConfigManager:
             return litellm.InfinityRerankConfig()
         elif litellm.LlmProviders.JINA_AI == provider:
             return litellm.JinaAIRerankConfig()
-        elif litellm.LlmProviders.GPUSTACK == provider:
-            return litellm.GPUStackRerankConfig()
-        elif litellm.LlmProviders.HOSTED_VLLM == provider:
-            return litellm.HostedVLLMRerankConfig()
+        elif provider in (
+            litellm.LlmProviders.GPUSTACK,
+            litellm.LlmProviders.HOSTED_VLLM,
+        ):
+            rerank_configs: Final = {
+                litellm.LlmProviders.GPUSTACK: litellm.GPUStackRerankConfig,
+                litellm.LlmProviders.HOSTED_VLLM: litellm.HostedVLLMRerankConfig,
+            }
+            return rerank_configs[provider]()
         elif litellm.LlmProviders.HUGGINGFACE == provider:
             return litellm.HuggingFaceRerankConfig()
         elif litellm.LlmProviders.DEEPINFRA == provider:
diff --git a/provider_endpoints_support.json b/provider_endpoints_support.json
index 0712e8e383d..f7798606ac2 100644
--- a/provider_endpoints_support.json
+++ b/provider_endpoints_support.json
@@ -1226,6 +1226,22 @@
         "interactions": true
       }
     },
+    "gpustack": {
+      "display_name": "GPUStack (`gpustack`)",
+      "url": "https://docs.litellm.ai/docs/providers/gpustack",
+      "endpoints": {
+        "chat_completions": false,
+        "messages": false,
+        "responses": false,
+        "embeddings": true,
+        "image_generations": false,
+        "audio_transcriptions": false,
+        "audio_speech": false,
+        "moderations": false,
+        "batches": false,
+        "rerank": true
+      }
+    },
     "heroku": {
       "display_name": "Heroku (`heroku`)",
       "url": "https://docs.litellm.ai/docs/providers/heroku",