Hi Mark,
Thank you for your update.
We have checked your query and came to know that you are trying to use grouping separator in linear gauge. We can use useGroupingSeparator property in linear gauge when localization is enabled. The “useGroupingSeparator” is used when format property and locale property is set in linear gauge. We have created the simple sample for the same and it can be downloaded from the following link.
Please let us know if you need further assistance.
Regards,
Swetha Babu