If we forget that GPRE is used in the core, GPRE is just an utility that calls the standard API and is not being updated with features or bug fixes.
It could be split to another sub-project and built. The built version will probably work with whatever client/server is installed and will not require maintenance. This could be a good option. The same could be done for QLI. Adriano Firebird-Devel mailing list, web interface at https://lists.sourceforge.net/lists/listinfo/firebird-devel
