When you do a full system backup and want to make sure that the ACUCOBOL-GT files are included in that backup, all you need to do is use a command that includes HFS files. By including HFS files you also include ACUCOBOL-GT files.
ACUCOBOL-GT files will be included in a full backup with STORE if you use a fileset like @.@.@:
:STORE @.@.@;;DIRECTORY
However, if you use a fileset like ?@.@.@:
:STORE ?@.@.@
the "?" excludes HFS files.
You can use the TREE option to force STORE to include HFS files if for some reason they are not being included with your fileset specification:
:STORE @.@.@;;TREE
For more details on backing up HFS files, see the STORE and TurboSTORE/iX Products Manual.