global Messenger System

Cost effective listserv 

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Global Messenger System (GMS) РA GTGI PHP-based email and SMS message solution that monitors feeds and subscription lists as well as manual pushes at a fraction of the cost of the commercial service provider. One federal agency saved more than $100K a year by owning the solution which sends out about 200K emails a day to subscribers! 

GMS product brief

Benefits At A Glance

  • Highly customizable
  • Uses AWS Simple Email Service for email and SMS messages
  • SMS to 200+ countries
  • Email to .gov and .mil without issues (no spoofing)
  • Plain text or html
  • RSS updates from your website kick off notifications to subscribers
  • Manual entry with scheduled release also possible
  • External subscription web page can be embedded on your flagship website

Newsletter and email marketing software

GMS helps you send email campaigns, newsletters, announcements and notifications. You can send a single email to hundreds, or millions of subscribers.

  • Emails are composed in a web interface.
  • Emails can be personalized.
  • You can use plain text, html and templates.
  • Subscribers are organized into lists.
  • You can import your email addresses and attributes from your email account, online shop, blog or database.
  • You can manage an unlimited number of segmented lists with complex demographic data.
  • Collaborate: You can manage your GMS with multiple administrators, flexible permissions and a collaborative workflow.
  • Internationalize: GMS can be used in 20+ languages, and subscribe pages can be internationalized too.

In control: your data belongs to you and you can host your own GMS.

Get help: documentation and email support are available to all GMS customers

  • Successful Permission Marketing
  • Clean, dynamic lists for subscriber satisfaction
  • GMS is designed to help you grow lists of engaged subscribers.
  • Easy import and export of subscriber data from any source.
  • Subscribers can update their own email address, personal data and subscription preferences.
  • Our double-opt in, easy unsubscribe system gets your email to the right people and increases your list quality.
  • Subscribers can be placed on a do-not-send list: you can’t accidentally send to them again once they unsubscribe.
  • Our message queue ensures that no subscriber receives the same campaign twice, even if they’re subscribed to several lists.
  • You can re-queue campaigns to send to new subscribers only.
  • Tailored and targeted messages for more engaging campaigns
  • Every email you send with GMS is uniquely customized for its recipient.
  • Collect and utilize subscriber attributes such as ‘name’, ‘country’ and ‘language’ alongside any attributes of your choice.
  • Use placeholders, attributes and lists to create highly engaging, individualized campaigns.
  • Unlimited list segmentation and target selection.
  • Exclude-list feature to refine segmentation even further.
  • Intelligent

Analyze and adapt

  • Analyze your campaigns with GMS’s inbuilt statistics, Google Analytics or Open Source Piwik.
  • Track how many users opened your message, clicked each link or forwarded the message and compare across campaigns.
  • View statistics by campaign, URL and subscriber for a thorough analysis.
  • Drilldown into your statistics to individual subscribers.
  • Use list segmentation to a/b test campaigns and improve performance.
  • Intelligent deliverability and bounce processing
  • Intelligent bounce processing.
  • Continuous monitoring of blacklists and deliverability. *
  • Automatic spam complaints processing from major mail hosts.

Expertise, documentation and support

  • Comprehensive and up to date documentation of GMS functionality.
  • Documentation available for beginners, regular users, power users and developers.
  • GMS blogs describing new features and tips/tricks for success.
  • Email support for GMS Hosted customers from the core development team.


  • A powerful list manager with flexible integration
  • Use all your data, get more from your lists

With GMS you can:

  • Import and manage complex data: use CSV files to import information about your subscribers.
  • Match each column of data on import with a custom attribute in GMS, so no data is discarded.
  • Use a ‘foreign key’ to update and synchronize lists with other databases without duplicating subscribers.
  • Use GMS as your primary database or alongside a CRM or CMS.
  • A powerful rest API is available.
  • GMS uses subscriber profiles to keep your data organized and accessible.
  • Smooth integration and unlimited subscribe pages
  • GMS can be fully integrated into your website

Subscribe pages: choose any combination of template, language, subscriber attribute and list to create the perfect page for every situation.

  • Integrate subscribe functionality using AJAX or the API: your site visitors can subscribe without leaving your website.
  • Set up email notifications to tell you when you get new subscribers.
  • Use your own domain and pre-configured AJAX scripts.


  • Feature Rich designing and sending
  • Creative freedom: it’s that simple.
  • Create beautiful HTML campaigns using a web interface.
  • Send well-formatted plain text versions to those subscribers who prefer it.
  • Send pdfs or documents as attachments.
  • Insert images into messages, or include them as remote links.
  • Design without the drama
  • Store and use multiple HTML templates.
  • Templates are applied to your campaigns after composition.
  • Our unique template system keeps your mails looking great while providing a simple, consistent interface for composition.
  • You can send a webpage, using custom HTML or a CMS like WordPress.
  • We provide basic templates alongside documentation for design.

Schedule your campaigns: send when the time is right

  • With GMS you control when you send your campaigns
  • You can schedule your campaigns to send at just the right time.
  • If your campaigns are time sensitive, you can use an embargo or stop sending on schedule.
  • will carry on sending even after gone home for the weekend.
  • Set your time zone.


  • Own your data, protect privacy
  • Our comprehensive export features mean that your data really belongs to you.
  • You can change service or software provider freely and manage your data in a way that suits you.
  • GMS is secure. Because it is Open Source, there is a large international community looking after the source code.
  • Each GMS installation and database on our servers is self-contained: your data belongs to you.
  • By utilizing the inbuilt link tracking, you own and control your data.