I think I have made them work in GIMP (2.10.10, linux).
1. Copy the .abr files to ~/.config/GIMP/2.10/brushes (you can leave them in subdirectories).
2. Copy the folders of patterns from the CSP brushes to ~/.config/GIMP/2.10/patterns (you can leave them in subdirectories and also leave them as pngs).
3. Using the clone tool, select "Pattern" as the source and select one of the glitch patterns. You can use any brush, but the new brushes will be square.
The only downside to this method is that the pattern does not scale with the brush, which I assume it would in PS or CSP. It also always starts in the same place in the pattern, so you'll want to move in different directions or swap the patterns with some frequency.
Anyway, thanks for making these! I found them in the giant bundle and I'm excited to use them.