[Trisquel-users] Installing Trisquel and gentoo on another drive, grub required?.

[kaptcha]

Hi I already got trisquel installed on a drive and I would like to try gentoo  
on another drive, I m very new to linux and I need to check some details  
first; this new drive requires installation of grub?. Or, otherwise the grub  
that I see at the beginning when I turn on my computer will be able to  
recognize and load gentoo previously installed on this new drive?.