While Security is getting more and more Important nowadays, it seems there is no way to use gMSA in PRTG. First problem is that Kerberos isn't supported with all delivered sensors (for example WMI seems to rely on NTLM) Second Problem and Bug BTW: Windows Credentials in PRTG are allowed to be saved without Password, but then you get an error when Adding Sensors which rely on WinCreds, all Sensors are greyed out and it says "these Sensors need valid Windows Credentials".
I think a Windows only product should support all Authentication Types which also the Windows Host Supports, because no one would lower Security on Systems only to get the Monitoring in PRTG running!
PLease think about changing the Logon/Authentication Process, so it is independent from the choosen sensor type.
Without using a domainadmin or globally available local admin which isn't security best practice it's not possible to monitor hundreds of servers right now, so again please add Support for gMSA.
And Finally please give your customers a ability to post development request which can be votet, here inside the knowledgebase is not the best place, im pretty sure you will get lots of valuable suggestions. (lol, I think there are more urgent requests then the "new alertmail design" every few releases ;-)