GO Contact Sync Mod Icon

GO Contact Sync Mod

Sync Outlook contacts and calendars with Google

4.5 Stars (205)
2,787 Downloads (This Week)
Last Update:
Download SetupGCSM-3.10.12.msi
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+++ NEWS +++
The newest versions of Google APIs client Library for .NET dropped support for .NET 4.0.
Minimum requirement for GO Contact Sync Mod (starting with v3.10.0) is .NET 4.5 which is not working on Windows XP.

GO Contact Sync Mod synchronizes your Microsoft Outlook contacts with your Google Mail address book, including pictures, categories and notes.
Since version 3.7.0 it also syncs your Outlook Calendar Appointments on demand to Google Calendar. This Mod fork adds many enhancements and bug fixes to the obviously dead project 'Go Contact Sync'.

Please find some guidelines how to sync your mobile phone contacts with Google Contacts here: http://www.google.com/mobile/sync

GO Contact Sync Mod Web Site


  • Full support of OAuth2 - no need for your password!
  • Outlook Contacts sync
  • Outlook Calendar Appointments sync
  • Automatic syncing
  • Contact Pictures support
  • Categories support
  • Supports Outlook 2003, 2007, 2010, 2013 and 2016 (32 and 64 bit)
  • No Support for Outlook Express
  • Select Outlook folder to sync
  • Sync with multiple GoogleMail accounts


User Ratings

ease 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 4 / 5
features 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 4 / 5
design 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 4 / 5
support 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 3 / 5
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User Reviews

  • 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5

    Good idea but not working !

    Posted 01/11/2016
  • 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5

    Good enough for contact sync. Calendar sync is terrible. It simply cannot deal with timezone changes or minor updates to calendar items.

    Posted 12/18/2015
  • 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5

    Since the last update this is the message I get when trying to sync= Warning] Cannot connect to Google, please check for available internet connection and proxy settings if applicable: The remote server returned an error: (400) Bad Request. Nothing has changed that I can find on my computer or Google settings. What am I doing wrong? Thanks

    Posted 04/21/2015
  • 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5

    I am very excited about this project if it can do what others have already experienced. However, I have not been able to get a successful sync yet, so my rating is based on it's potential only. If it actually will start successfully syncing my calendar, that would make it a 4-5 star app easily. Using 3.9.0 with Windows 7 and Outlook 2013

    Posted 12/05/2014
  • 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5

    Found a bug, I am currently use this application with Outlook 2013, Windows 8.1, Go Sync Mod 3.8.5 with an LG G3 Phone. I have also noticed this with Outlook 2010, Windows 8.1 and the Samsung Galaxy 3 Phone. When creating a contact it appears that all information Syncs across all devices however: When updating a contact on the phone: - Just updating the notes - the notes sync with GMAIL and I can see the updated contact. However when running the Go Sync Mod application it does not update the Outlook contact. I currently have it set to MERGE PROMPT. - I then proceeded to updated the contact details such as address and group on the phone. The change again was noted in GMAIL. However when running the Go Sync Mod application. Instead of updating my Outlook Contact. It deleted it. I didn't notice it until now and then realized it has been doing this for the past 4 versions of the application. I have not numerous contacts not realizing that they were deleted because I made an update on my phone. So Go Sync Mod seems to work if going from: Outlook > GMAIL > Phone but when you go Phone > GMAIL > Outlook you will loose contacts when updating.

    Posted 12/01/2014
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Additional Project Details



Intended Audience

End Users/Desktop

User Interface


Programming Language




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