I would like to share with you that I'm currently engaged in one of my personal projects creating the Generic Object Services (GOS) Troubleshooting Guide.
Please check it and update me with your feedback in a direct message on SCN. More information about GOS can be found in the online help documentation.
The GOS FAQ (created in 2009 and updated frequently) can also provide helpful information regarding the most common questions in GOS, but I decided to create this troubleshooting guide to provide step-by-step guides for errors and questions on the behavior in different scenarios.