This tool helps you migrate all your accounts and transactions from Moneyguru to GnuCash.
I've written this because exporting QIF files from MoneyGuru and then importing these from GnuCash resulted in frequent duplicated transactions, and with many years of transactions recorded, a manual fix (even with the help of GnuCash duplicates detection) would have been much slower and less fun than writing this tool.
For this tool, I've put together code taken from here and there; you'll likely recognise stuff from moneyguru and GnuCash themselves, as well as gnucash-qif-import which serves a similar purpose but did not resolve my specific problem.
I also thank the authors of the mentioned tools for helping me do my accounting for so many years.