The version is "bundled (2.1.0 compatible)"
This seems very out of date, with 2.1.0. had been released in 2013.
Is there a way to get a more recent version? In particular, 2.3.0? Or are you looking to update the version included with cPanel?
cPanel's EasyApache 4 uses the gd version bundled with PHP. This is why it would show outdated because PHP hasn't updated their bundled gd version in a long time. Unfortunately, there isn't a way to update gd without building and compiling your own PHP versions.