Sounds like a cool idea. Linking these two services would probably provide a boost to both.
From a technical perspective, on the GoKibitz side it is probably just a matter of fetching the SGFs from OGS and either doing this automatically for all games or providing an interface to select the desired games.
However, on the OGS side, there also seems to be some work necessary in fixing some issues in how SGF files are generated. OGS currently produces invalid SGF files, which may cause issues when importing into other services and apps.