I did try to look through this to see if it has been answered, but attempting to find a GPU accelerated nostr vanity address generator, and this is as close as I've found so far. Obviously not the same thing but, just trying to figure out if there is a branch of this that could do that, or something else made to do so? Using CPU only is brutal.
You could go to project development :
https://bitcointalk.org/index.php?board=12.0 there are some windows GPU versions, some are not open source, so do your research before using.