No, you should not mention your indirect incomes in table 5F of GSTR 9. Table 5F is meant for reporting the value of non-GST supplies, which are the supplies that are not liable to GST, such as petroleum products, alcoholic liquor for human consumption, electricity, etc.1 Indirect incomes, such as dividend, interest, forex fluctuation, profit on sale of asset, etc., are not considered as non-GST supplies, as they are not supplies of goods or services at all.23
You should report your indirect incomes in table 5O of GSTR 9, which is the turnover as per the audited annual financial statement.3 This table should include all the income items that are part of your financial statement, whether they are related to GST or not.3 You should also reconcile the difference between the turnover declared in table 5O and the turnover derived from the summation of all tables from 5A to 5N in table 5P.3