Recently a client on a freelance project and the release of the eDrawings App for iPad (review for app here) had me looking at it to transfer and share some Solidworks files.
For existing files on Google drive you can share the item and email it to someone simply by opening the file and clicking the share link (how about that.... so intuitive!), which they can then open from their email on the iPad
If you happen to be browsing already on an iPad, with the eDrawings app installed, you can navigate to Google Drive and select the item. Instead of showing the "No preview available" screen it will recognize the file type and pop up the below screen asking if you want to open it in eDrawings.
When trying to view the files this created huge issues. Google Drive would sense the Word file and try to preview as such, instead of sensing the .sldprt, so you could not open in the App. This below is what showed including the text "Sorry, we are unable to generate a view of the document at this time. Please try again later. You can also try to download the original document by clicking here"
So what happens if you turn Settings: Conversion: OFF. While then the file doesn't upload at all. Check the screen show below. With this setting I kept getting the error "This file could not be imported because the contents of the file do not match the file extension." The only thing I can imagine is that the upload is looking inside the file and seeing the same type of thing that makes it convert to .doc, but instead just kicks it back because something further through the file fails.