Checkpoint64 has a preset for Guilty Gear Strive: it already knows where the config folder is, backs it up automatically and keeps every version. Everything this site has on Guilty Gear Strive:
Guilty Gear Strive
-
Config file location
Windows:
%LOCALAPPDATA%\GGST\Saved\Config -
Backup guide
Competitive games keep your progress on their servers — what's on your disk is the config. Checkpoint64 versions the settings folder for 67 games and 16 dedicated servers, so a reinstall or a file verification can't cost you your binds. Free download.