diff --git a/gnss/aidl/default/GnssAssistanceInterface.cpp b/gnss/aidl/default/GnssAssistanceInterface.cpp
new file mode 100644
index 0000000..2ef334c
--- /dev/null
+++ b/gnss/aidl/default/GnssAssistanceInterface.cpp
@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2024 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.
+ */
+
+#define LOG_TAG "GnssAssistanceInterfaceAidl"
+
+#include "GnssAssistanceInterface.h"
+#include <aidl/android/hardware/gnss/BnGnss.h>
+#include <log/log.h>
+
+namespace aidl::android::hardware::gnss::gnss_assistance {
+
+std::shared_ptr<IGnssAssistanceCallback> GnssAssistanceInterface::sCallback = nullptr;
+
+ndk::ScopedAStatus GnssAssistanceInterface::setCallback(
+        const std::shared_ptr<IGnssAssistanceCallback>& callback) {
+    ALOGD("setCallback");
+    std::unique_lock<std::mutex> lock(mMutex);
+    sCallback = callback;
+    return ndk::ScopedAStatus::ok();
+}
+
+ndk::ScopedAStatus GnssAssistanceInterface::injectGnssAssistance(
+        const GnssAssistance& gnssAssistance) {
+    ALOGD("injectGnssAssistance. %s", gnssAssistance.toString().c_str());
+    if (gnssAssistance.gpsAssistance.satelliteEphemeris.size() == 0 &&
+        gnssAssistance.gpsAssistance.satelliteCorrections.size() == 0) {
+        ALOGE("Empty GnssAssistance");
+        return ndk::ScopedAStatus::fromServiceSpecificError(IGnss::ERROR_INVALID_ARGUMENT);
+    }
+    return ndk::ScopedAStatus::ok();
+}
+}  // namespace aidl::android::hardware::gnss::gnss_assistance