Proprietor's interest income on saving bank and fixed deposit

no it is not required to be shown as it is not counted in turnover

I think it should be shown as exempt supply...

Not required to show in gst returns.

Interest earned from a local company or a local bank means that you have received a payment for a financial service’s exempt supply, which falls under Schedule IV of the Goods and Services Tax Act. The interest received will not be subject to GST. However, receipt of interest income will fall under “Income from other sources”, and income tax will have to be paid on it if you fall under its ambit.

True this is exempt income. However, do we have to show it in GSTR 1 of proprietorship concern under exempt supplies. These items are in personal name and therefore are not in the books of account of the proprietorship concern. They are not part of P&L account made for proprietorship concern and are taxed as income from other sources in income tax.