diff --git a/Gemfile b/Gemfile
index adfdfae42..2d6d1cc32 100644
--- a/Gemfile
+++ b/Gemfile
@@ -23,6 +23,7 @@ group :development do
   gem 'logging', '~> 2.2'
   gem 'opencensus', '~> 0.4'
   gem 'httparty'
+  gem 'gems', '~> 1.2'
 end
 
 platforms :jruby do
diff --git a/Rakefile b/Rakefile
index 1af25898d..c71b461f0 100644
--- a/Rakefile
+++ b/Rakefile
@@ -79,10 +79,28 @@ namespace :kokoro do
   end
 
   task :release do
-    # Until code generation process is updated and release-please is set up, just publish docs
-    require_relative "rakelib/devsite/devsite_builder.rb"
+    Rake::Task["kokoro:publish_gem"].invoke
+    Rake::Task["kokoro:publish_docs"].invoke
+  end
 
-    DevsiteBuilder.new.publish_if_missing ENV["DOCS_BUILD_TAG"]
+  task :publish_gem do
+    require "gems"
+
+    load_env_vars if ENV["KOKORO_GFILE_DIR"]
+    api_token = ENV["RUBYGEMS_API_TOKEN"]
+    if api_token
+      ::Gems.configure do |config|
+        config.key = api_token
+      end
+    end
+
+    rm_rf "pkg"
+    Rake::Task["build"].invoke
+    built_gem_path = Dir.glob("pkg/google-api-client-*.gem").last
+
+    response = ::Gems.push File.new path_to_be_pushed
+    puts response
+    raise "Failed to release gem" unless response.include? "Successfully registered gem:"
   end
 
   desc "Publish docs for the latest git tag"
@@ -93,6 +111,16 @@ namespace :kokoro do
   end
 end
 
+def load_env_vars
+  service_account = "#{ENV['KOKORO_GFILE_DIR']}/service-account.json"
+  raise "#{service_account} is not a file" unless File.file? service_account
+  ENV["GOOGLE_APPLICATION_CREDENTIALS"] = service_account
+  filename = "#{ENV['KOKORO_GFILE_DIR']}/ruby_env_vars.json"
+  raise "#{filename} is not a file" unless File.file? filename
+  env_vars = JSON.parse File.read(filename)
+  env_vars.each { |k, v| ENV[k] ||= v }
+end
+
 def header str, token = "#"
   line_length = str.length + 8
   puts
diff --git a/google-api-client.gemspec b/google-api-client.gemspec
index 4b2b2eb36..b341f138e 100644
--- a/google-api-client.gemspec
+++ b/google-api-client.gemspec
@@ -2,35 +2,35 @@ lib = File.expand_path('../lib', __FILE__)
 $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
 require 'google/apis/version'
 
-Gem::Specification.new do |spec|
-  spec.name          = 'google-api-client'
-  spec.version       = Google::Apis::VERSION
-  spec.authors       = ['Steven Bazyl', 'Tim Emiola', 'Sergio Gomes', 'Bob Aman']
-  spec.email         = ['sbazyl@google.com']
-  spec.summary       = 'Client for accessing Google APIs'
-  spec.homepage      = 'https://github.com/google/google-api-ruby-client'
-  spec.license       = 'Apache-2.0'
-  spec.metadata      = {
+Gem::Specification.new do |gem|
+  gem.name          = 'google-api-client'
+  gem.version       = Google::Apis::VERSION
+  gem.authors       = ['Steven Bazyl', 'Tim Emiola', 'Sergio Gomes', 'Bob Aman']
+  gem.email         = ['sbazyl@google.com']
+  gem.summary       = 'Client for accessing Google APIs'
+  gem.homepage      = 'https://github.com/google/google-api-ruby-client'
+  gem.license       = 'Apache-2.0'
+  gem.metadata      = {
     "documentation_uri" => "https://googleapis.dev/ruby/google-api-client/v#{Google::Apis::VERSION}"
   }
 
-  spec.files         = `git ls-files -z`
-                       .split("\x0")
-                       .reject { |f| f.match(%r{^(spec|script)/|^api_names_out|synth\.metadata}) }
+  gem.files         = `git ls-files -z`
+                      .split("\x0")
+                      .reject { |f| f.match(%r{^(spec|script)/|^api_names_out|synth\.metadata}) }
 
-  spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
-  spec.require_paths = %w[lib generated]
+  gem.executables   = gem.files.grep(%r{^bin/}) { |f| File.basename(f) }
+  gem.require_paths = %w[lib generated]
 
-  spec.required_ruby_version = '>= 2.4'
+  gem.required_ruby_version = '>= 2.4'
 
-  spec.add_runtime_dependency 'representable', '~> 3.0'
-  spec.add_runtime_dependency 'retriable', '>= 2.0', '< 4.0'
-  spec.add_runtime_dependency 'addressable', '~> 2.5', '>= 2.5.1'
-  spec.add_runtime_dependency 'mini_mime', '~> 1.0'
-  spec.add_runtime_dependency 'signet', '~> 0.12'
-  spec.add_runtime_dependency 'googleauth', '~> 0.9'
-  spec.add_runtime_dependency 'httpclient', '>= 2.8.1', '< 3.0'
-  spec.add_runtime_dependency 'rexml'
-  spec.add_development_dependency 'thor', '~> 0.19'
-  spec.add_development_dependency 'activesupport', '>= 4.2', '< 5.1'
+  gem.add_runtime_dependency 'representable', '~> 3.0'
+  gem.add_runtime_dependency 'retriable', '>= 2.0', '< 4.0'
+  gem.add_runtime_dependency 'addressable', '~> 2.5', '>= 2.5.1'
+  gem.add_runtime_dependency 'mini_mime', '~> 1.0'
+  gem.add_runtime_dependency 'signet', '~> 0.12'
+  gem.add_runtime_dependency 'googleauth', '~> 0.9'
+  gem.add_runtime_dependency 'httpclient', '>= 2.8.1', '< 3.0'
+  gem.add_runtime_dependency 'rexml'
+  gem.add_development_dependency 'thor', '~> 0.19'
+  gem.add_development_dependency 'activesupport', '>= 4.2', '< 5.1'
 end