Table cell gridlines

There is not one line of MS Word code in Pages, nor did Apple develop it to be a Word clone. You must manually hide the grid lines in a Pages table if you do not want them to appear on printed matter.

Of course, you could use Word on macOS to get those missing options… 😎

With your table selected, click on the Cell tab and then click on the Border style that you want to apply, its symbology, and thickness. Using those tools you can add or remove individual borders in a cell or group of cells.

When I insert a new table, and visit the Cell tab, with the border style still set to default, and then choose No Border, I am left with this:

The gridlines for the individual cells remain. If I click on the outline border icon, and change from No Border to a line segment then I get the outside border replaced around the table. If I select the table and then click on the upper-right Border symbol, the grid lines will double until I select Border Style to None, then the entire table grid vanishes. This latter mode will prevent Pages from printing gridlines in your table.