Hi Chandin,
We have GCS endpoints running successfully on hosts with FIPS enabled.
It looks like for 9.5, enabling FIPS also installs a system crypto
policy that disables the use of the NULL cipher, which is needed for
unencrypted data transfers. Given that restriction, you'll need to
force encryption on your collections. You can do that by passing the
'--force-encryption' option to the collection create/update command.
Let us know if you have any issues with that. We'll make sure to note
this behavior in our documentation.
Mike