I'd like to be alerted before my Google calender appointment's are due, and I don't want to install a ton of dependencies, I have limited space.
I tried one but it polled Google too much and it broke, I forgot which it is though.
Evolution? It's primarily an email client, I know but it does also have an events/calendar side to it that can sync in with Google. It's also included in the default install of Ubuntu.
No idea if it'll automatically create reminders. I'm sure there's something you could hack together (a little script that talked to Evolution) if it doesn't do it all for you.
This is an old question, but you might be looking for something like gcalcli. You might also want to see this fork for some modifications which allow it to be used in a daemon mode, and provide pop-up snooze-able reminders.