To download and install the Cite While You Write™ plug-in to use with Word:
It is possible to use EndNote to place citations into a Google Doc. It will take a few steps and you will still need to have EndNote installed on your desktop.
Step 1: Drag and drop your citations from EndNote to where you want to place them in your Google doc.
Step 2: When you're finished writing, download your Google doc in Rich Text Format (.rtf)
Step 3: In EndNote, select Tools - Format Paper - Format Paper and choose your .rtf file
Step 4: In the Format Paper dialog box that appears, choose the citation style you want under Output Style and click Format.
Step 5. Save the paper as a .rtf file to your desktop. Note: you will lose the citation formatting if you upload this file back into Google docs so complete these steps after you're finished writing.