Currently, GeekoCFD images are not available on SUSE Studio, and an error 500 page is shown. I am looking into the cause of this. This may be related to the migration of SUSE Studio to Studio Express. Please, stay tuned for status updates.
Updates (reverse chronological order)
Update Dec 8th, 2017: It was announced that SUSE Studio will be shutdown on Feb. 15th, 2018. Official announcement from Studio developers here.
Update Dec. 2nd, 2017: The migration of GeekoCFD to the Studio Express infrastructure is still ongoing. At the moment, several attempts to perform the migration have not been successful because the import feature (see http://blog.susestudio.com/2017/06/open-build-service-integration.html) of KIWI images does not seem to properly extract the source.kiwi.txz file. More updates soon.