Remind to Google Calendar

1. Have a publicly accessible server.
2. Use the rem2ics script to generate an .ics file periodically in a cron job.
3. Automatically upload the generated ics file to the server. I do this via scpy and authorized public keys.
4. Subscribe to this publicly accessible .ics file from Google Calendar.

Google Calendar to Remind

1. Make a calendar in Google Calendar. This is where you'll add your events to from your mobile phone. Make this calendar the default calendar.

2. Use this prune_gcal.py, which grabs all the events in the default calendar in your Google account, deletes them, and outputs them in the reminders format.

3. Setup a configuration file in ~/.prune_gcal, where the first line is the Google account username, and the second line is the password. E.g.:

   myemail@gmail.com
   mypassword
   

4. Add this to a cron job:

   prune_gcal.py >> ~/.reminders 2>/dev/null
   

And that should let you use Remind as you normally would on your PC, and Google Calendar on your phone.

The only caveat here is that your schedule would be publicly accessible somewhere, but you can either have it under an HTTPS URL (note that Google requires you to have a valid certificate; a self-generated certificate would not work), and/or have an obscure URL.