'Gary Groundwork' is all about laying the foundation for desired sick leave (i.e. unjustified sick leave). This can involve over fake coughing, forced sniffling or pretending to lose one's voice. This is usually supported by verbal commentary such as 'I think I'm coming down with something'. Expertly performed 'Gary Groundwork' dupes co-workers and draws unwaranted sympathy. Therefore, when you call in sick, others have noticed that you supposedly had certain symptoms and comment accordingly.
Is Melanie really sick or is it just Gary Groundwork
Geez, Melanie is laying on the Gary Groundwork nice and thick today!
A reference to the show Spongebob Squarepants, where Spongebob give's his pet snail breakfast and says "serving it up, Gary's Way". Also refers to the act of taking a "study drug", eating, and drinking a caffeinated drink all at the same time.
You: I have a midterm tomorrow and I haven't studied yet.
Your Friend: Oh, so are you going to study Gary's Way?
You: Yes!