I have installed the full trisquel now so can't test mini, but i didnt find gparted,from memory i had to install it.
there is a utility just called disks it is useful and in the system settings of the full trisquel, it is in the repo and can be installed in mini but is not there by default. it was sometimes buggy and sometimes worked, i think depending on other factors i don't now remember. at first i had several other things that would normally require authentication fail to launch from gui with no error , but the only one that persisted like that was synaptic. once i installed MATE synaptic would launch from the menu, just not from the trisquel mini menu
