Upload Google Drawings
While in Google Drawings go to the top left corner and open the File tab. In the File menu select Publish to the Web and this menu should open.
Now open the P2 page where you want to put the Google Drawing and click the Upload/Insert button. Select the From URL tab and add a title for your drawing.
From the Google Drawing menu copy the Document Link that is given and paste it into the URL spot in the P2 menu. Exit out of the Google Drawing menu by pressing close. Copy the URL (from the actual page) from the Google Drawing and paste it into the Link to Image spot in the P2 menu.
Click Insert into Post in the P2 menu and then Post It in P2. Your drawing is now uploaded and will automatically change on P2 if you edit the image in Google Drawing.