diff --git a/google/genai/_gaos/google_genai.py b/google/genai/_gaos/google_genai.py
index dc9b3e44c..f9bc83e7b 100644
--- a/google/genai/_gaos/google_genai.py
+++ b/google/genai/_gaos/google_genai.py
@@ -45,6 +45,7 @@
     wrap_stream_errors,
 )
 from .sdk import AsyncGenAI, GenAI
+from .types import environments
 from .types import interactions
 from .types.security import Security
 from .utils import BackoffStrategy, RetryConfig, eventstreaming
@@ -761,10 +762,69 @@ async def list_executions(self, *args: Any, **kwargs: Any) -> Any:
             return await async_wrap_sdk_call(super().list_executions, *args, **kwargs)
 
 
+class GeminiNextGenEnvironmentFiles:
+    """Environment files resource backed by the NextGen client."""
+
+    def __init__(self, parent: GeminiNextGenEnvironments):
+        self._parent = parent
+
+    def get(self, *args: Any, **kwargs: Any) -> Any:
+        files_sdk = getattr(super(GeminiNextGenEnvironments, self._parent), 'files', None)
+        if files_sdk is not None and hasattr(files_sdk, 'get'):
+            return wrap_sdk_call(files_sdk.get, *args, **kwargs)
+        raise AttributeError(
+            'environments.files.get is only available in the private SDK.'
+        )
+
+    def download(
+        self,
+        *,
+        environment: str,
+        path: str,
+        http_options: Optional[Any] = None,
+    ) -> bytes:
+        """Downloads binary file content from an environment workspace."""
+        return self._parent.download_file(
+            environment=environment,
+            path=path,
+            http_options=http_options,
+        )
+
+
+class AsyncGeminiNextGenEnvironmentFiles:
+    """Async environment files resource backed by the NextGen client."""
+
+    def __init__(self, parent: AsyncGeminiNextGenEnvironments):
+        self._parent = parent
+
+    async def get(self, *args: Any, **kwargs: Any) -> Any:
+        files_sdk = getattr(super(AsyncGeminiNextGenEnvironments, self._parent), 'files', None)
+        if files_sdk is not None and hasattr(files_sdk, 'get'):
+            return await async_wrap_sdk_call(files_sdk.get, *args, **kwargs)
+        raise AttributeError(
+            'environments.files.get is only available in the private SDK.'
+        )
+
+    async def download(
+        self,
+        *,
+        environment: str,
+        path: str,
+        http_options: Optional[Any] = None,
+    ) -> bytes:
+        """Downloads binary file content from an environment workspace."""
+        return await self._parent.download_file(
+            environment=environment,
+            path=path,
+            http_options=http_options,
+        )
+
+
 class GeminiNextGenEnvironments(GeneratedEnvironments):
     """Public environments resource backed by the NextGen client."""
 
     def __init__(self, api_client: Any):
+        self._api_client = api_client
         sdk = build_google_genai_client(api_client)
         super().__init__(sdk.sdk_configuration, parent_ref=sdk)
 
@@ -777,6 +837,10 @@ def with_raw_response(self):
         def with_streaming_response(self):
             return _RawResponseAccessorProxy(super().with_streaming_response)
 
+        @property
+        def files(self) -> GeminiNextGenEnvironmentFiles:
+            return GeminiNextGenEnvironmentFiles(self)
+
         def create_environment(self, *args: Any, **kwargs: Any) -> Any:
             return wrap_sdk_call(super().create_environment, *args, **kwargs)
 
@@ -802,15 +866,37 @@ def delete(self, *args: Any, **kwargs: Any) -> Any:
             return self.delete_environment(*args, **kwargs)
 
         def get_environment_files(self, *args: Any, **kwargs: Any) -> Any:
-            return wrap_sdk_call(super().get_environment_files, *args, **kwargs)
+            return self.files.get(*args, **kwargs)
+
+        def get_files(self, *args: Any, **kwargs: Any) -> Any:
+            return self.files.get(*args, **kwargs)
 
-        # NOTE: update_environment, patch_environment are handled by fallback if they exist, but we assume they aren't generated based on our openapi.json.
+        def download_file(
+            self,
+            *,
+            environment: str,
+            path: str,
+            http_options: Optional[Any] = None,
+        ) -> bytes:
+            """Downloads binary file content from an environment workspace."""
+            env_name = (
+                environment
+                if environment.startswith('environments/')
+                else f'environments/{environment}'
+            )
+            clean_path = path.lstrip('/')
+            download_path = f'{env_name}/files/{clean_path}?alt=media'
+            return self._api_client.download_file(
+                download_path,
+                http_options=http_options,
+            )
 
 
 class AsyncGeminiNextGenEnvironments(GeneratedAsyncEnvironments):
     """Async public environments resource backed by the NextGen client."""
 
     def __init__(self, api_client: Any):
+        self._api_client = api_client
         sdk = build_google_genai_async_client(api_client)
         super().__init__(sdk.sdk_configuration, parent_ref=sdk)
 
@@ -823,6 +909,10 @@ def with_raw_response(self):
         def with_streaming_response(self):
             return _AsyncRawResponseAccessorProxy(super().with_streaming_response)
 
+        @property
+        def files(self) -> AsyncGeminiNextGenEnvironmentFiles:
+            return AsyncGeminiNextGenEnvironmentFiles(self)
+
         async def create_environment(self, *args: Any, **kwargs: Any) -> Any:
             return await async_wrap_sdk_call(super().create_environment, *args, **kwargs)
 
@@ -848,7 +938,30 @@ async def delete(self, *args: Any, **kwargs: Any) -> Any:
             return await self.delete_environment(*args, **kwargs)
 
         async def get_environment_files(self, *args: Any, **kwargs: Any) -> Any:
-            return await async_wrap_sdk_call(super().get_environment_files, *args, **kwargs)
+            return await self.files.get(*args, **kwargs)
+
+        async def get_files(self, *args: Any, **kwargs: Any) -> Any:
+            return await self.files.get(*args, **kwargs)
+
+        async def download_file(
+            self,
+            *,
+            environment: str,
+            path: str,
+            http_options: Optional[Any] = None,
+        ) -> bytes:
+            """Downloads binary file content from an environment workspace."""
+            env_name = (
+                environment
+                if environment.startswith('environments/')
+                else f'environments/{environment}'
+            )
+            clean_path = path.lstrip('/')
+            download_path = f'{env_name}/files/{clean_path}?alt=media'
+            return await self._api_client.async_download_file(
+                download_path,
+                http_options=http_options,
+            )
 
 
 def _add_output_properties_if_interaction(value: Any) -> Any:
diff --git a/google/genai/tests/gaos/test_environments_lifecycle.py b/google/genai/tests/gaos/test_environments_lifecycle.py
index bc1fdb6b6..894ca4cb4 100644
--- a/google/genai/tests/gaos/test_environments_lifecycle.py
+++ b/google/genai/tests/gaos/test_environments_lifecycle.py
@@ -116,3 +116,145 @@ def test_python_environments_lifecycle_routes_through_google_genai_client(
     server.shutdown()
     thread.join()
     server.server_close()
+
+
+class _ScottyDownloadHandler(BaseHTTPRequestHandler):
+  captured: list[str] = []
+
+  def do_GET(self) -> None:
+    self.captured.append(f"GET {self.path}")
+    if "?alt=media" in self.path:
+      payload = b"print('downloaded content')\n"
+      self.send_response(200)
+      self.send_header("content-type", "application/octet-stream")
+      self.send_header("content-length", str(len(payload)))
+      self.end_headers()
+      self.wfile.write(payload)
+      return
+    elif "/files" in self.path:
+      payload = json.dumps({"files": [{"name": "main.py"}]}).encode()
+      self.send_response(200)
+      self.send_header("content-type", "application/json")
+      self.send_header("content-length", str(len(payload)))
+      self.end_headers()
+      self.wfile.write(payload)
+      return
+
+    self.send_response(404)
+    self.end_headers()
+
+  def log_message(self, *args) -> None:
+    pass
+
+
+def test_python_environments_files_get_and_download(monkeypatch):
+  monkeypatch.delenv("GOOGLE_GENAI_USE_VERTEXAI", raising=False)
+  captured: list[str] = []
+  handler = type("Handler", (_ScottyDownloadHandler,), {
+      "captured": captured,
+  })
+  server = ThreadingHTTPServer(("127.0.0.1", 0), handler)
+  thread = threading.Thread(target=server.serve_forever, daemon=True)
+  thread.start()
+  try:
+    client = Client(
+        api_key="test-api-key",
+        http_options={
+            "api_version": "v1beta",
+            "base_url": f"http://127.0.0.1:{server.server_port}",
+            "headers": {"X-Goog-Api-Client": "test"},
+        },
+    )
+
+    # Test sync files.get
+    if getattr(client.environments, "_sdk_files", None) is not None:
+      files_res = client.environments.files.get(
+          environment="env_123",
+          path="src/main.py",
+      )
+      files_list = files_res.files if hasattr(files_res, "files") else files_res.get("files", [])
+      assert len(files_list) == 1
+      assert (files_list[0].name if hasattr(files_list[0], "name") else files_list[0]["name"]) == "main.py"
+    else:
+      with pytest.raises(AttributeError, match="only available in the private SDK"):
+        client.environments.files.get(
+            environment="env_123",
+            path="src/main.py",
+        )
+
+    # Test sync files.download
+    downloaded = client.environments.files.download(
+        environment="env_123",
+        path="src/main.py",
+    )
+    assert downloaded == b"print('downloaded content')\n"
+
+    # Test download_file convenience alias
+    downloaded_alias = client.environments.download_file(
+        environment="env_123",
+        path="src/main.py",
+    )
+    assert downloaded_alias == b"print('downloaded content')\n"
+
+  finally:
+    server.shutdown()
+    thread.join()
+    server.server_close()
+
+
+@pytest.mark.asyncio
+async def test_python_environments_async_files_get_and_download(monkeypatch):
+  monkeypatch.delenv("GOOGLE_GENAI_USE_VERTEXAI", raising=False)
+  captured: list[str] = []
+  handler = type("Handler", (_ScottyDownloadHandler,), {
+      "captured": captured,
+  })
+  server = ThreadingHTTPServer(("127.0.0.1", 0), handler)
+  thread = threading.Thread(target=server.serve_forever, daemon=True)
+  thread.start()
+  try:
+    client = Client(
+        api_key="test-api-key",
+        http_options={
+            "api_version": "v1beta",
+            "base_url": f"http://127.0.0.1:{server.server_port}",
+        },
+    )
+
+    # Test async files.get
+    if getattr(client.aio.environments, "_sdk_files", None) is not None:
+      files_res = await client.aio.environments.files.get(
+          environment="env_123",
+          path="src/main.py",
+      )
+      files_list = files_res.files if hasattr(files_res, "files") else files_res.get("files", [])
+      assert len(files_list) == 1
+      assert (files_list[0].name if hasattr(files_list[0], "name") else files_list[0]["name"]) == "main.py"
+    else:
+      with pytest.raises(AttributeError, match="only available in the private SDK"):
+        await client.aio.environments.files.get(
+            environment="env_123",
+            path="src/main.py",
+        )
+
+    # Test async files.download
+    downloaded = await client.aio.environments.files.download(
+        environment="env_123",
+        path="src/main.py",
+    )
+    assert downloaded == b"print('downloaded content')\n"
+
+    # Test async download_file convenience alias
+    downloaded_alias = await client.aio.environments.download_file(
+        environment="env_123",
+        path="src/main.py",
+    )
+    assert downloaded_alias == b"print('downloaded content')\n"
+
+  finally:
+    server.shutdown()
+    thread.join()
+    server.server_close()
+
+
+