Good points all round, I actually never knew compact libraries couldn't be accessed by other labVIEW versions. I uploaded this work as a finished solution, which I think is very useful. I can't release the code for the Master or Client libraries, as I use a plethora of different COM libraries.
But!, I will upload the .net45 library I built for Google Drive and Sheets (which is probably the bits you want), these are LabVIEW VI's with .NET assemblies, which control the API calls.
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Edit: Library Attached (LabVIEW 2015 SP1), Enjoy!
GDLV.zip