Girokarte is a synonym for Debitkarte, just like in France or Swiss Romade one would say carte bleue instead of carte debit, in Portugal Multibanco instead of cartão de débito,...
As for the rest, I guest we are wasting each other's time discussing this any furher.
> Girokarte is a synonym for Debitkarte
I'm not sure how to handle this because it's both incorrect in technical language (Girocards are exclusive to a particular payment infrastructure that only exists in Germany, unless partnered with a separate payment infrastructure, but the co-branded payment infrastructure is only used outside of Germany [1]) as well as incorrect with respect to my experience with everyday language, including all of the links I've provided including from official government sources.
But I agree on one thing: it's a waste of time to keep talking about this.
Here's another example [1, page 116] from the BMI (so, federal now): "Haben Sie ein Konto bei einer Bank oder einer Sparkasse, wird Ihnen häufig eine Giro-card oder eine Kreditkarte ausgestellt (zum Teil gegen Gebühr), mit der Sie bezahlen können. Der bezahlte Betrag wird dann automatisch von Ihrem Konto abgebucht"
> If you have an account by a bank or a Sparkasse (special kind of bank), you will often be issued a Girokarte or a Kreditkarte (sometimes for a fee), with which you can pay. The paid amount will then be automatically deducted from your account.
Note that Debitkarte isn't even mentioned, and the behavior described for both kinds of cards is the same. This is not true of Kreditkarten that operate on a revolving credit basis; the amount is not automatically deducted from your account, but rather paid later. To me, this language is pretty clear: the federal government sees the system as "you either have a Girokarte or a Kreditkarte" and that Debitkarten are included in Kreditkarten.
[1] https://www.bmi.bund.de/SharedDocs/downloads/DE/publikatione...