diff --git a/gnss/2.0/default/Android.bp b/gnss/2.0/default/Android.bp
index 985aa2b..f327197 100644
--- a/gnss/2.0/default/Android.bp
+++ b/gnss/2.0/default/Android.bp
@@ -40,4 +40,7 @@
         "android.hardware.gnss@1.0",
         "android.hardware.gnss@1.1",
     ],
+    static_libs: [
+        "android.hardware.gnss@common-default-lib",
+    ],
 }
diff --git a/gnss/2.0/default/Gnss.cpp b/gnss/2.0/default/Gnss.cpp
index 217f0f3..1efc9f5 100644
--- a/gnss/2.0/default/Gnss.cpp
+++ b/gnss/2.0/default/Gnss.cpp
@@ -23,8 +23,10 @@
 #include "GnssConfiguration.h"
 #include "GnssMeasurement.h"
 #include "GnssVisibilityControl.h"
+#include "Utils.h"
 
 using ::android::hardware::Status;
+using ::android::hardware::gnss::common::Utils;
 using ::android::hardware::gnss::visibility_control::V1_0::implementation::GnssVisibilityControl;
 
 namespace android {
@@ -33,9 +35,17 @@
 namespace V2_0 {
 namespace implementation {
 
+using GnssSvFlags = IGnssCallback::GnssSvFlags;
+
 sp<V2_0::IGnssCallback> Gnss::sGnssCallback_2_0 = nullptr;
 sp<V1_1::IGnssCallback> Gnss::sGnssCallback_1_1 = nullptr;
 
+Gnss::Gnss() : mMinIntervalMs(1000) {}
+
+Gnss::~Gnss() {
+    stop();
+}
+
 // Methods from V1_0::IGnss follow.
 Return<bool> Gnss::setCallback(const sp<V1_0::IGnssCallback>&) {
     // TODO implement
@@ -43,13 +53,29 @@
 }
 
 Return<bool> Gnss::start() {
-    // TODO implement
-    return bool{};
+    if (mIsActive) {
+        ALOGW("Gnss has started. Restarting...");
+        stop();
+    }
+
+    mIsActive = true;
+    mThread = std::thread([this]() {
+        while (mIsActive == true) {
+            const auto location = Utils::getMockLocation();
+            this->reportLocation(location);
+
+            std::this_thread::sleep_for(std::chrono::milliseconds(mMinIntervalMs));
+        }
+    });
+    return true;
 }
 
 Return<bool> Gnss::stop() {
-    // TODO implement
-    return bool{};
+    mIsActive = false;
+    if (mThread.joinable()) {
+        mThread.join();
+    }
+    return true;
 }
 
 Return<void> Gnss::cleanup() {
@@ -164,8 +190,7 @@
 Return<bool> Gnss::setPositionMode_1_1(V1_0::IGnss::GnssPositionMode,
                                        V1_0::IGnss::GnssPositionRecurrence, uint32_t, uint32_t,
                                        uint32_t, bool) {
-    // TODO implement
-    return bool{};
+    return true;
 }
 
 Return<sp<V1_1::IGnssConfiguration>> Gnss::getExtensionGnssConfiguration_1_1() {
@@ -243,6 +268,16 @@
     return true;
 }
 
+Return<void> Gnss::reportLocation(const GnssLocation& location) const {
+    std::unique_lock<std::mutex> lock(mMutex);
+    if (sGnssCallback_1_1 == nullptr) {
+        ALOGE("%s: sGnssCallback is null.", __func__);
+        return Void();
+    }
+    sGnssCallback_1_1->gnssLocationCb(location);
+    return Void();
+}
+
 }  // namespace implementation
 }  // namespace V2_0
 }  // namespace gnss
diff --git a/gnss/2.0/default/Gnss.h b/gnss/2.0/default/Gnss.h
index 890b026..7d9e783 100644
--- a/gnss/2.0/default/Gnss.h
+++ b/gnss/2.0/default/Gnss.h
@@ -20,6 +20,9 @@
 #include <android/hardware/gnss/2.0/IGnss.h>
 #include <hidl/MQDescriptor.h>
 #include <hidl/Status.h>
+#include <atomic>
+#include <mutex>
+#include <thread>
 
 namespace android {
 namespace hardware {
@@ -35,7 +38,14 @@
 using ::android::hardware::Return;
 using ::android::hardware::Void;
 
+using GnssConstellationType = V1_0::GnssConstellationType;
+using GnssLocation = V1_0::GnssLocation;
+using GnssSvInfo = V1_0::IGnssCallback::GnssSvInfo;
+using GnssSvStatus = V1_0::IGnssCallback::GnssSvStatus;
+
 struct Gnss : public IGnss {
+    Gnss();
+    ~Gnss();
     // Methods from V1_0::IGnss follow.
     Return<bool> setCallback(const sp<V1_0::IGnssCallback>& callback) override;
     Return<bool> start() override;
@@ -69,7 +79,7 @@
                                      uint32_t preferredTimeMs, bool lowPowerMode) override;
     Return<sp<V1_1::IGnssConfiguration>> getExtensionGnssConfiguration_1_1() override;
     Return<sp<V1_1::IGnssMeasurement>> getExtensionGnssMeasurement_1_1() override;
-    Return<bool> injectBestLocation(const V1_0::GnssLocation& location) override;
+    Return<bool> injectBestLocation(const GnssLocation& location) override;
 
     // Methods from V2_0::IGnss follow.
     Return<sp<V2_0::IGnssConfiguration>> getExtensionGnssConfiguration_2_0() override;
@@ -83,8 +93,13 @@
             override;
 
    private:
-    static sp<V2_0::IGnssCallback> sGnssCallback_2_0;
-    static sp<V1_1::IGnssCallback> sGnssCallback_1_1;
+     Return<void> reportLocation(const GnssLocation&) const;
+     static sp<V2_0::IGnssCallback> sGnssCallback_2_0;
+     static sp<V1_1::IGnssCallback> sGnssCallback_1_1;
+     std::atomic<long> mMinIntervalMs;
+     std::atomic<bool> mIsActive;
+     std::thread mThread;
+     mutable std::mutex mMutex;
 };
 
 }  // namespace implementation