Would give a zero if possible. Had a package that required 21+ signature for retrieval and GSO totally dropped the ball. Came one day in the afternoon when no one was home. Took time from work to ensure we'd be home the following day for delivery and instead that night found an attempted delivery note on our front porch, not filled out. Just laying on the ground. No information and no one had knocked or rang attempting to delivery. Tried again for an apparent third time, at same time as first delivery attempt and again no one was home. Left information how to call and have package held for pick up. Called and its already been sent back to the original sender...
The person with customer service I spoke too could barely contain their lack of care and did next to nothing to help me aside from telling me to call the original sender. So GSO immediately passed the buck after bungled attempts to deliver.
It's a sad day when your company leaves someone yearning for the dependability of the USPS.