Now our Gitlab omnibus install it is not the only app running on that VM, the main task will be to update Java which at the moment is as per below, Need to be upgraded to version 17
$java -version
openjdk version “1.8.0_422”
OpenJDK Runtime Environment (build 1.8.0_422-8u422-b05-1~20.04-b05)
OpenJDK 64-Bit Server VM (build 25.422-b05, mixed mode)
Gitlab doesn’t use Java, so you can update it. But that is not a question to be asked here on how to do it. Just install the version from the Linux distributions repositories and remove the old one.
@iwalker helpful as always, just wanted to be sure, the last Gitlab upgrade cycle was painful but successful, mostly because your help. I just wanted to be sure that I am not going to break anything upgrading Java, how and version my own issue, many thanks and happy weekend!
Well you won’t break anything related to Gitlab 
Now whether the Java version change will have/cause problems with whatever you are running with it, now that is a different matter but hope it goes well for you!