Ubuntu Guide posted a tutorial about manage Grub2 boot loader using Grub Customizer(GUI)

Grub Customizer is a graphical interface to configure the grub2/burg settings with focus on the individual list order without losing the dynamical behavior of grub.The main feature is the boot entry list configuration but not simply by modified the grub.cfg: to keep the dynamical configuration, this application will only edit the script order

  Manager Grub2 boot loader using Grub Customizer(GUI)