At least, it keeps defaulting to A4 for some bizarre reason (and doesn't stick to Letter when I set it to that.) gpdf-2.7.91-1.
That doesn't happen for me. With gpdf-2.8.0-1, I get US Letter per default. gpdf does remember my last setting between different uses of the print dialog, but not between different runs of the binary. Do you still see this problem, Bill ?
Appears to work in 2.8.0-1.