For more info about GameMaker visit its official website - gamemaker.io (formerly yoyogames.com).
Versions are numbered as YYYY.MM.P.B, where:
YYYY - YEAR of release
MM - MONTH on which it was released (usually end of); beta versions are numbered as MONTH * 100
P - number of PATCH/fix (0 if it was first release)
B - total number of internal builds since May 2022 (last reset of build number was short before 2022.5 release, not every build is released to public)
So, for example: 2022.6.1.53 means: update #1 for version released at end of June(6) 2022, 53rd build in total (since May 2022).
There are no releases in July and December because of Holiday season peak.
Below versions are discontinued, and thus may be not available to download. Their release notes are here only for sentimental purposes :)