diff --git a/src/connectivity/gps/service/1.1/GnssGeofencing.cpp b/src/connectivity/gps/service/1.1/GnssGeofencing.cpp
new file mode 100644
index 0000000..3d51140
--- /dev/null
+++ b/src/connectivity/gps/service/1.1/GnssGeofencing.cpp
@@ -0,0 +1,225 @@
+/*
+ * Copyright (C) 2016 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 "GnssHal_GnssGeofencing"
+
+#include "GnssGeofencing.h"
+#include <GnssUtils.h>
+
+namespace android {
+namespace hardware {
+namespace gnss {
+namespace V1_0 {
+namespace implementation {
+
+std::vector<std::unique_ptr<ThreadFuncArgs>> GnssGeofencing::sThreadFuncArgsList;
+sp<IGnssGeofenceCallback> GnssGeofencing::mGnssGeofencingCbIface = nullptr;
+bool GnssGeofencing::sInterfaceExists = false;
+
+GpsGeofenceCallbacks_ext GnssGeofencing::sGnssGfCb = {
+    .geofence_transition_callback = gnssGfTransitionCb,
+    .geofence_status_callback = gnssGfStatusCb,
+    .geofence_add_callback = gnssGfAddCb,
+    .geofence_remove_callback = gnssGfRemoveCb,
+    .geofence_pause_callback = gnssGfPauseCb,
+    .geofence_resume_callback = gnssGfResumeCb,
+    .create_thread_cb = createThreadCb
+};
+
+GnssGeofencing::GnssGeofencing(const GpsGeofencingInterface_ext* gpsGeofencingIface)
+    : mGnssGeofencingIface(gpsGeofencingIface) {
+    /* Error out if an instance of the interface already exists. */
+    LOG_ALWAYS_FATAL_IF(sInterfaceExists);
+    sInterfaceExists = true;
+}
+
+GnssGeofencing::~GnssGeofencing() {
+    sThreadFuncArgsList.clear();
+    sInterfaceExists = false;
+}
+void GnssGeofencing::gnssGfTransitionCb(int32_t geofenceId,
+                                        GpsLocation_ext* location,
+                                        int32_t transition,
+                                        GpsUtcTime timestamp) {
+    if (mGnssGeofencingCbIface == nullptr) {
+        ALOGE("%s: GNSS Geofence Callback Interface configured incorrectly", __func__);
+        return;
+    }
+
+    if (location == nullptr) {
+        ALOGE("%s : Invalid location from GNSS HAL", __func__);
+        return;
+    }
+
+    GnssLocation gnssLocation = convertToGnssLocation(location);
+    auto ret = mGnssGeofencingCbIface->gnssGeofenceTransitionCb(
+            geofenceId,
+            gnssLocation,
+            static_cast<IGnssGeofenceCallback::GeofenceTransition>(transition),
+            timestamp);
+    if (!ret.isOk()) {
+        ALOGE("%s: Unable to invoke callback", __func__);
+    }
+}
+
+void GnssGeofencing::gnssGfStatusCb(int32_t status, GpsLocation_ext* location) {
+    if (mGnssGeofencingCbIface == nullptr) {
+        ALOGE("%s: GNSS Geofence Callback Interface configured incorrectly", __func__);
+        return;
+    }
+
+    GnssLocation gnssLocation;
+
+    if (location != nullptr) {
+        gnssLocation = convertToGnssLocation(location);
+    } else {
+        gnssLocation = {};
+    }
+
+    auto ret = mGnssGeofencingCbIface->gnssGeofenceStatusCb(
+            static_cast<IGnssGeofenceCallback::GeofenceAvailability>(status), gnssLocation);
+    if (!ret.isOk()) {
+        ALOGE("%s: Unable to invoke callback", __func__);
+    }
+}
+
+void GnssGeofencing::gnssGfAddCb(int32_t geofenceId, int32_t status) {
+    if (mGnssGeofencingCbIface == nullptr) {
+        ALOGE("%s: GNSS Geofence Callback Interface configured incorrectly", __func__);
+        return;
+    }
+
+    auto ret = mGnssGeofencingCbIface->gnssGeofenceAddCb(
+            geofenceId, static_cast<IGnssGeofenceCallback::GeofenceStatus>(status));
+    if (!ret.isOk()) {
+        ALOGE("%s: Unable to invoke callback", __func__);
+    }
+}
+
+void GnssGeofencing::gnssGfRemoveCb(int32_t geofenceId, int32_t status) {
+    if (mGnssGeofencingCbIface == nullptr) {
+        ALOGE("%s: GNSS Geofence Callback Interface configured incorrectly", __func__);
+        return;
+    }
+
+    auto ret = mGnssGeofencingCbIface->gnssGeofenceRemoveCb(
+            geofenceId, static_cast<IGnssGeofenceCallback::GeofenceStatus>(status));
+    if (!ret.isOk()) {
+        ALOGE("%s: Unable to invoke callback", __func__);
+    }
+}
+
+void GnssGeofencing::gnssGfPauseCb(int32_t geofenceId, int32_t status) {
+    if (mGnssGeofencingCbIface == nullptr) {
+        ALOGE("%s: GNSS Geofence Callback Interface configured incorrectly", __func__);
+        return;
+    }
+
+    auto ret = mGnssGeofencingCbIface->gnssGeofencePauseCb(
+            geofenceId, static_cast<IGnssGeofenceCallback::GeofenceStatus>(status));
+    if (!ret.isOk()) {
+        ALOGE("%s: Unable to invoke callback", __func__);
+    }
+}
+
+void GnssGeofencing::gnssGfResumeCb(int32_t geofenceId, int32_t status) {
+    if (mGnssGeofencingCbIface == nullptr) {
+        ALOGE("%s: GNSS Geofence Callback Interface configured incorrectly", __func__);
+        return;
+    }
+
+    auto ret = mGnssGeofencingCbIface->gnssGeofenceResumeCb(
+            geofenceId, static_cast<IGnssGeofenceCallback::GeofenceStatus>(status));
+    if (!ret.isOk()) {
+        ALOGE("%s: Unable to invoke callback", __func__);
+    }
+}
+
+pthread_t GnssGeofencing::createThreadCb(const char* name, void (*start)(void*), void* arg) {
+    return createPthread(name, start, arg, &sThreadFuncArgsList);
+}
+
+// Methods from ::android::hardware::gnss::V1_0::IGnssGeofencing follow.
+Return<void> GnssGeofencing::setCallback(const sp<IGnssGeofenceCallback>& callback)  {
+    mGnssGeofencingCbIface = callback;
+
+    if (mGnssGeofencingIface == nullptr) {
+        ALOGE("%s: GnssGeofencing interface is not available", __func__);
+    } else {
+        mGnssGeofencingIface->init(&sGnssGfCb);
+    }
+
+    return Void();
+}
+
+Return<void> GnssGeofencing::addGeofence(
+        int32_t geofenceId,
+        double latitudeDegrees,
+        double longitudeDegrees,
+        double radiusMeters,
+        IGnssGeofenceCallback::GeofenceTransition lastTransition,
+        int32_t monitorTransitions,
+        uint32_t notificationResponsivenessMs,
+        uint32_t unknownTimerMs)  {
+    if (mGnssGeofencingIface == nullptr) {
+        ALOGE("%s: GnssGeofencing interface is not available", __func__);
+        return Void();
+    } else {
+        mGnssGeofencingIface->add_geofence_area(
+                geofenceId,
+                latitudeDegrees,
+                longitudeDegrees,
+                radiusMeters,
+                static_cast<int32_t>(lastTransition),
+                monitorTransitions,
+                notificationResponsivenessMs,
+                unknownTimerMs);
+    }
+    return Void();
+}
+
+Return<void> GnssGeofencing::pauseGeofence(int32_t geofenceId)  {
+    if (mGnssGeofencingIface == nullptr) {
+        ALOGE("%s: GnssGeofencing interface is not available", __func__);
+    } else {
+        mGnssGeofencingIface->pause_geofence(geofenceId);
+    }
+    return Void();
+}
+
+Return<void> GnssGeofencing::resumeGeofence(int32_t geofenceId, int32_t monitorTransitions)  {
+    if (mGnssGeofencingIface == nullptr) {
+        ALOGE("%s: GnssGeofencing interface is not available", __func__);
+    } else {
+        mGnssGeofencingIface->resume_geofence(geofenceId, monitorTransitions);
+    }
+    return Void();
+}
+
+Return<void> GnssGeofencing::removeGeofence(int32_t geofenceId)  {
+    if (mGnssGeofencingIface == nullptr) {
+        ALOGE("%s: GnssGeofencing interface is not available", __func__);
+    } else {
+        mGnssGeofencingIface->remove_geofence_area(geofenceId);
+    }
+    return Void();
+}
+
+}  // namespace implementation
+}  // namespace V1_0
+}  // namespace gnss
+}  // namespace hardware
+}  // namespace android