Enum PageNavigationType

// Create a form and add a new multiple-choice item and a page-break item.
const form = FormApp.create('Form Name');
const item = form.addMultipleChoiceItem();
const pageBreak = form.addPageBreakItem();

// Set some choices with go-to-page logic.
const rightChoice = item.createChoice(
    'Vanilla',
    FormApp.PageNavigationType.SUBMIT,
);
const wrongChoice = item.createChoice(
    'Chocolate',
    FormApp.PageNavigationType.RESTART,
);

// For GO_TO_PAGE, just pass in the page break item. For CONTINUE (normally the
// default), pass in CONTINUE explicitly because page navigation cannot be mixed
// with non-navigation choices.
const iffyChoice = item.createChoice('Peanut', pageBreak);
const otherChoice = item.createChoice(
    'Strawberry',
    FormApp.PageNavigationType.CONTINUE,
);
item.setChoices([rightChoice, wrongChoice, iffyChoice, otherChoice]);