diff --git a/fbpcf/io/cloud_util/CloudFileUtil.cpp b/fbpcf/io/cloud_util/CloudFileUtil.cpp
index ebe58daa..8097c751 100644
--- a/fbpcf/io/cloud_util/CloudFileUtil.cpp
+++ b/fbpcf/io/cloud_util/CloudFileUtil.cpp
@@ -6,11 +6,13 @@
  */
 
 #include "fbpcf/io/cloud_util/CloudFileUtil.h"
+#include <aws/s3/S3Client.h>
 #include <re2/re2.h>
 #include "fbpcf/aws/S3Util.h"
 #include "fbpcf/exception/PcfException.h"
 #include "fbpcf/gcp/GCSUtil.h"
 #include "fbpcf/io/cloud_util/GCSFileReader.h"
+#include "fbpcf/io/cloud_util/GCSFileUploader.h"
 #include "fbpcf/io/cloud_util/S3Client.h"
 #include "fbpcf/io/cloud_util/S3FileReader.h"
 #include "fbpcf/io/cloud_util/S3FileUploader.h"
@@ -18,15 +20,17 @@
 namespace fbpcf::cloudio {
 
 CloudFileType getCloudFileType(const std::string& filePath) {
-  // S3 file format:
-  // 1. https://bucket-name.s3.region.amazonaws.com/key-name
-  // 2. https://bucket-name.s3-region.amazonaws.com/key-name
-  // 3. s3://bucket-name/key-name
-  // GCS file format:
-  // 1. https://storage.cloud.google.com/bucket-name/key-name
-  // 2. https://bucket-name.storage.googleapis.com/key-name
-  // 3. https://storage.googleapis.com/bucket-name/key-name
-  // 4. gs://bucket-name/key-name
+  /*
+   * S3 file format:
+   *   1. https://bucket-name.s3.region.amazonaws.com/key-name
+   *   2. https://bucket-name.s3-region.amazonaws.com/key-name
+   *   3. s3://bucket-name/key-name
+   * GCS file format:
+   *   1. https://storage.cloud.google.com/bucket-name/key-name
+   *   2. https://bucket-name.storage.googleapis.com/key-name
+   *   3. https://storage.googleapis.com/bucket-name/key-name
+   *   4. gs://bucket-name/key-name
+   */
   static const re2::RE2 s3Regex1(
       "https://[a-z0-9.-]+.s3.[a-z0-9-]+.amazonaws.com/.+");
   static const re2::RE2 s3Regex2(
@@ -77,6 +81,9 @@ std::unique_ptr<IFileUploader> getCloudFileUploader(
             fbpcf::aws::S3ClientOption{.region = ref.region})
             .getS3Client(),
         filePath);
+  } else if (fileType == CloudFileType::GCS) {
+    return std::make_unique<GCSFileUploader>(
+        fbpcf::gcp::createGCSClient(), filePath);
   } else {
     throw fbpcf::PcfException("Not supported yet.");
   }
diff --git a/fbpcf/io/cloud_util/GCSFileUploader.cpp b/fbpcf/io/cloud_util/GCSFileUploader.cpp
new file mode 100644
index 00000000..cb1ab287
--- /dev/null
+++ b/fbpcf/io/cloud_util/GCSFileUploader.cpp
@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#include <folly/logging/xlog.h>
+
+#include "fbpcf/exception/GcpException.h"
+#include "fbpcf/gcp/GCSUtil.h"
+#include "fbpcf/io/cloud_util/GCSFileUploader.h"
+
+namespace fbpcf::cloudio {
+static const std::string FILE_TYPE = "text/csv";
+
+void GCSFileUploader::init() {}
+
+int32_t GCSFileUploader::upload(std::vector<char>& buf) {
+  XLOG(INFO) << "Start resumable upload. ";
+  const auto& ref = fbpcf::gcp::uriToObjectReference(filePath_);
+  std::string bucket_ = ref.bucket;
+  std::string object_ = ref.key;
+
+  namespace gcs = ::google::cloud::storage;
+  using ::google::cloud::StatusOr;
+  std::string str(buf.begin(), buf.end());
+
+  StatusOr<gcs::ObjectMetadata> object_metadata = gcsClient_->InsertObject(
+      bucket_, object_, str, gcs::ContentType(FILE_TYPE));
+
+  if (!object_metadata) {
+    throw GcpException{
+        "Resumable upload failed: " + object_metadata.status().message()};
+    return 0;
+  }
+  XLOG(INFO) << " Resumable upload successful ";
+  XLOG(INFO) << "Bucket: " << bucket_ << ", Object Name: " << object_;
+  return str.size();
+}
+
+int GCSFileUploader::complete() {
+  return 0;
+}
+} // namespace fbpcf::cloudio
diff --git a/fbpcf/io/cloud_util/GCSFileUploader.h b/fbpcf/io/cloud_util/GCSFileUploader.h
new file mode 100644
index 00000000..c099ec00
--- /dev/null
+++ b/fbpcf/io/cloud_util/GCSFileUploader.h
@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#pragma once
+
+#include <memory>
+#include <vector>
+
+#include <google/cloud/storage/client.h>
+#include "fbpcf/io/cloud_util/IFileUploader.h"
+
+namespace fbpcf::cloudio {
+class GCSFileUploader : public IFileUploader {
+ public:
+  explicit GCSFileUploader(
+      std::shared_ptr<google::cloud::storage::Client> gcsClient,
+      const std::string& filePath)
+      : gcsClient_{std::move(gcsClient)}, filePath_{filePath} {
+    init();
+  }
+  int upload(std::vector<char>& buf) override;
+  int complete() override;
+
+ private:
+  void init() override;
+
+  std::shared_ptr<google::cloud::storage::Client> gcsClient_;
+  const std::string filePath_;
+};
+
+} // namespace fbpcf::cloudio