"E: Package 'gs' has no installation candidate" ...

[Albretch Mueller]

$ uname -a
Linux debian 5.10.0-10-amd64 #1 SMP Debian 5.10.84-1 (2021-12-08)
x86_64 GNU/Linux
~
 basically I need to extract, merge, ... pages from pdf files and gs
was the way to go?
 Do you know what is going on?
 Do you know of a way to work around it, probably using an older package?
 Any alternative you would suggest?
 Thank you,
 lbrtchx