I\'ve found lots of examples of coding the deprecated UIapp forms, but very few using the new FormApp class.
What I need is essentially a Grid control that has text
Google's FormApp is limited to a fixed number of Item types - just those that are provided by the Forms Service GUI. There is no way to create custom question types or layouts. I suspect the limited ability to customize is the reason you don't find much effort dedicated to creating script examples.
If the data you are collecting requires a different layout than any of the provided "Items", then your only practical option within the Google Apps Script world is to create a custom interface using UiApp or the HtmlService, and record responses into a spreadsheet.
Alternatively, you can submit a feature request on the Google Apps Script Issue Tracker. However, unless the Item already exists in Google Forms (Google Docs), it's unlikely to get any traction from the Google Apps team. (My opinion - I don't speak for Google.)