Thank you very much for your feedback!

I've just checked to see it works well. Could you please check if you have the bi-direction set in the right way:

Please go to the Settings page on web version: https://i.doit.im/home/#/settings/account , click two buttons:
1. Click “Link to Google Cal, which is used to sync tasks in Doit.im to Google Cal;
2. Click “Modify the reverse-synced calendar lists”, and choose a calendar of Google Cal, which you may use to sync tasks from Google Cal to Doit.im.

Having finished the above settings, you may see the two sides can sync each other’s tasks. If you want to see the latest data of Google Cal in Doit.im, just click “Sync GCal”. It’s because there are quotas for Google’s sync, that is, it is unable to transmit data automatically to other apps from time to time.

If any further questions, please feel free to contact us.
Nice day!

@Kassy i do this, not working.

Doit.im is not showing events created in google calendar even after synchronization.
This makes big confusion in my planning. Please support.

@uchojaka Thank you very much for your feedback!
I've checked and found that you may see the events in in Doit.im that created in GCal, but you have to tap "Sync GCal" in Settings of Doit.im of iPhone version. And if you still don't see the item, please tap 'Sync' manually since there is sometimes sync delay.
If still any problems, please feel free to contact us.
Nice day!