The 4.x.x series kernels are also supported by the packages in the linux-gpib for 3.xx and 2.6.x kernels folder.
The latest stable release (linux-gpib-4.1.0) has been tested on linux version 4.13.4 from kernel.org
There is no 4.0.4 stable release. The release candidates in the 4.0.4 folder under linux-gpib for 3.x.x
and 2.6.x kernels are deprecated and will remain on-line until 30 January 2018 in case they may still be needed.