Getting gnome desktop

I goofed in the install and don't have the Gnome interface. How do I get it now or must I reinstall and hopefully don't make the wrong selection on startup as I did initially?

what system did you start
only a view infos lots of missing
my wizardballl is in repaicenter so i guess you are on so <you may get it while and if you

OS
System
Version
kernal
....