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Quick Start Guide

  1. Download and Install GS Server.
  2. Start your mount and setup a COM port or find which COM port it’s using in windows
  3. Run GS Server from the desktop shortcut.
  4. Click the 3 bars to open and configure the settings.
  5. Be sure to set COM port, Baud Rate, Mount to SkyWatcher, and Observatory Location.
  6. Click the Close button and exit GS Server
  7. Open your planetarium program and select an ASCOM connection.
  8. In the ASCOM chooser select ASCOM.GS.Sky.Telescope and click Ok or Close
  9. Click Connect from your planetarium program.
  10. GS Server will start and connect to the mount.  If you do not connect check your settings and click the ‘Connect’ button.
  11. Connect other applications to GS Server as needed.
  12. If guiding with PHD2 you will want to check mark the option “Reverse Dec output after meridian flip”
  13. Please restart GS Server if you changed the hemispheres in the Observatory Location.


  • Computer with Windows 7 SP1 or newer
  • Microsoft .NET Framework 4.7.2 installed
  • ASCOM Platform 6.4 or later
  • Telescope mount that supports the Synta protocol
  • EQ Direct cable is preferred if the mount does not have a USB port.


After downloading Setup .exe file run and follow the prompts.  The default location of files and settings can be found in the following locations on Windows systems.

  • GSS Program Files-  C:\Program Files (x86)\Common Files\ASCOM\GSServer
  • Log files – My Documents\GSServer
  • Monitor files – My Documents\GSServer
  • User Config – C:\Users\{User Name}\AppData\Local\GS_Server

Notes Templates-  C:\Program Files (x86)\Common Files\ASCOM\GSServer\Templates

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