GParted is currently not available in EPEL for RHEL/CentOS 10. It was requested, but the maintainers haven't responded in bugzilla so far.
In general, if you are missing a package in the EPEL repository, you should fill a bug requesting it to be added.
As an alternative to GParted, you can try using GNOME Disks (package is called gnome-disk-utility) or the storage plugin in Cockpit (both available in the AppStream repository) or blivet-gui (available in EPEL).
gvim is available in the AppStream repository, the package is called vim-X11.