What wrong ?
# make install
===> Patching for ruby18-gems-1.2.0
===> ruby18-gems-1.2.0 depends on file: /usr/local/bin/ruby18 - found
===> Applying FreeBSD patches for ruby18-gems-1.2.0
3 out of 3 hunks failed--saving rejects to lib/rubygems/source_info_cache.rb.rej
=> Patch patch-lib-rubygems-source_info_cache.rb failed to apply cleanly.
*** Error code 1
Stop in /usr/ports/devel/ruby-gems.
# pkg_add -r ruby-gems
Error: FTP Unable to get ftp://ftp.freebsd.org/pub/FreeBSD/ports/i386/packages-7.0-release/Latest/ruby-gems.tbz: File unavailable (e.g., file not found, no access)
pkg_add: unable to fetch 'ftp://ftp.freebsd.org/pub/FreeBSD/ports/i386/packages-7.0-release/Latest/ruby-gems.tbz' by URL