Table 4-1 in the PCI Express Compiler User Guide incorrectly shows device support for Gen2 in Arria II GX devices and no Gen2 support in Arria II GZ devices. The opposite is true—Arria II GZ does support Gen2 and Arria II GX does not.
This is a documentation error only.
No workarounds are required.
This issue is fixed in version 11.0 of the IP Compiler for PCI Express User Guide.