If you use Crossover and want to use GSAK, you might need to actually get a copy of Wine. Currently, Crossover contains a patch from Wine that does not allow GSAK to work well. The problem is being worked. I am hoping that a new version of Crossover will implement enough new functionality that GSAK will again work.
Currently, bugzilla 6151 has info on which patch breaks GSAK, so if you are bold enough to download a copy of wine and "unapply" the patch, then you'll have a shdocvw.dll.so that might work. If I can, I'll post something there that can be used in place of the current shdocvw.dll.
Right now there are no Crossover versions that do not have this patch.