When I copy cells from 123 to Excel, the gridlined neither print nor display regardless of settings in page format.
Have you tried
resetting the formats for the cells you have copied in?
You may have already done this, but check again the following in excel
Go to Page layout, Under the gridlines Ribbon(Excel 2007) Tick and Untick the view and print options.
Or you could try the following:
When you copy from 123, choose pastespecial, nut just paste. you can then choose from a number of options from the menu. One of them is paste formats.