/usr/share/maven-repo/org/codehaus/gmavenplus/gmavenplus-plugin/1.5/gmavenplus-plugin-1.5.jar is in libgmavenplus-java 1.5-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/maven-repo/org/codehaus/gmavenplus/gmavenplus-plugin/1.5/../../../../../../java/gmavenplus-plugin.jar