How to Install Gimp on CentOS Gnu/Linux 7

Installing

2. 2. Installing Flatpak

   How to Setup Flatpak on CentOS 7

   Flatpak CentOS 7 Installation Guide

   Flatpak CentOS 7 Setup.

3. 3. Installing Latest Gimp

   Then to Install Latest Gimp App on CentOS 7
   To Setup the Repo play:

   flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo

   For further Insight see the Flatpak Official Documentation.
   And after:

   flatpak install https://flathub.org/repo/appstream/org.gimp.GIMP.flatpakref

   The Flatpak App Setup do Not need the sudo Command because then it Runs confined into a Sandbox.
   However, you’ll be Prompted to Authenticate with your User’s Admin Pass.
   Then Confirm the proposed Setup with ‘Enter’ and Wait patiently until the App is Downloaded, Built and Installed.