Multiple cameras on one screen?

Well first off, is this even possible? I hate to not include any script, But I just want to know if it can even be done in the first place. I want this so I can make a gui with a sort of, ZAxis

Visual: http://prntscr.com/8c99fe

If this isn't possible, is there an alternative way of replicating my need?

ROBLOX only allows for one camera; it's sadly not possible. It is defiantly possible to write your own 3D framework in GUIs though.