GParted is currently not available in EPEL for RHEL/CentOS 10. It was [requested][1], 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][2] 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][4] (both available in the AppStream repository) or [blivet-gui][3] (available in EPEL).

gvim is available in the AppStream repository, the package is called `vim-X11`.

 [1]: https://bugzilla.redhat.com/show_bug.cgi?id=2389018
 [2]: https://docs.fedoraproject.org/en-US/epel/epel-package-request/
 [3]: https://fedoraproject.org/wiki/Blivet-gui
 [4]: https://fedoramagazine.org/storage-management-with-cockpit/