Yes, you can lose GoPoints for the following reasons:
Abandoning a GoCatch job
Misuse of the app
After accepting a job, if you abandon the job, you will lose GoPoints immediately.
The following reasons for abandoning a job are unacceptable
A passenger jumped in your vehicle
You did not read the Pickup and/or Destination properly
Breaches of the Driver Code of Conduct
If you do this often your status will be downgraded to the previous level.
For example, if you are a Silver Driver and you abandon too many jobs, you will be downgraded to Bronze status.