If you supply your own parmlib member or data set containing GTF trace options, you can select any of the options listed in GTF trace options. Each instance of GTF can be activated with the same or different set of options.
The member containing predefined trace options does not have to reside in the parmlib member. GTF will accept any data set specified in the SYSLIB DD statement of the cataloged procedure, or in the START command, as long as that data set's attributes are compatible with those of SYS1.PARMLIB.