I'm trying to display the balance in each Account (i.e., Banking, Business, Investing, Property & Debt) at the end of a quarter.
No, those account types are not shown in any report.
Reports > Net Worth & Balances > Account Balances
This report allows you to set the time frame and the interval. Quarterly is an option.
The Account Balances report does that. It's under Reports > Net Worth & Balance > Account Balances. Just change the interval at the top of the report to quarterly.
Thanks Rocket, but I was trying to match the headings under Accounts, which, for me, include "Banking", "Business", "Investing", and "Property & Debt".