Good.
After a breakpoint has occurred, hover over the variable for which you want an address. If you've set the option that requires the ctrl key to be tapped, do so.
The elements of the variable should then appear in the debuggers log to copy/paste.
Depending on the GDB version being used, for the first attempt to display the expression (variable or whatever), the GDB may be quite slow. After the first display, the subsequent evaluations/displays will be much faster.