There is a Firebird centos 7 epel repository and yes is fully supported http://fedoraproject.org/wiki/EPEL http://fedoraproject.org/wiki/EPEL
http://dl.fedoraproject.org/pub/epel/7/x86_64/repoview/firebird-superclassic.html http://dl.fedoraproject.org/pub/epel/7/x86_64/repoview/firebird-superclassic.html
