This mod disables the integrity check (version check) against the exe of GTA V, where the game will test if it is the latest version as of the game launch using the function that calls CryptAcquireContextA, CryptMsgGetParam, and CryptQueryObject. Looks like Rockstar started testing even in Steam and EGS version starting from April 4th 2023 (in UTC) at the latest.
In short words, this mod just makes GTA5.exe not listen to the result of version check.
Exe Integrity Bypass Against RGL is licensed under BSD Zero Clause License. Too few pieces of materials to be worth keeping secret.