diff --git a/gnss/aidl/default/AGnssRil.h b/gnss/aidl/default/AGnssRil.h
new file mode 100644
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+++ b/gnss/aidl/default/AGnssRil.h
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+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <aidl/android/hardware/gnss/BnAGnssRil.h>
+
+namespace aidl::android::hardware::gnss {
+
+struct AGnssRil : public BnAGnssRil {
+  public:
+    ndk::ScopedAStatus setCallback(const std::shared_ptr<IAGnssRilCallback>& callback) override;
+    ndk::ScopedAStatus setRefLocation(const AGnssRefLocation& agnssReflocation) override;
+    ndk::ScopedAStatus setSetId(SetIDType type, const std::string& setid) override;
+    ndk::ScopedAStatus updateNetworkState(const NetworkAttributes& attributes) override;
+
+  private:
+    // Synchronization lock for sCallback
+    mutable std::mutex mMutex;
+    // Guarded by mMutex
+    static std::shared_ptr<IAGnssRilCallback> sCallback;
+};
+
+}  // namespace aidl::android::hardware::gnss