CMS doesn't generally support CESM, but these are some things that may be helpful for users of the model
A basic configuration for running CESM2 on Gadi is available at https://github.com/coecms/cesm2-gadi
CESM requires the Perl module XML::LibXML. You'll need to install this yourself, which you can do on Gadi by running
If you've not used Perl before it will ask you some questions on where to install it, the defaults are fine and will install it into your home directory at ~/perl5.
You may need to run the command twice to properly install the library