/usr/bin/fastjar
/usr/bin/gcj-dbtool
/usr/bin/gij
/usr/bin/gjar
/usr/bin/gjarsigner
/usr/bin/gkeytool
/usr/bin/gorbd
/usr/bin/grepjar
/usr/bin/grmic
/usr/bin/grmid
/usr/bin/grmiregistry
/usr/bin/gserialver
/usr/bin/gtnameserv
/usr/bin/jv-convert
You may install this package on CentOS with
yum
install libgcj