The GSD file for the SST-PFB-SLC module should already be included in the SST Profibus configuration software. If you see the SST-PFB-SLC in the Masters / SST folder, then you have everything you need. In my software (2002 vintage) the Version 1.4 GSD file is already installed.

If you need that GSD file, you can get it from Woodhead Connectivity (owners of SST). Start at their support website:

http://www.mysst.com/tech/content.asp

You will eventually get to their firmware and GSD file set:

http://www.mySST.com/pub/drivers/pfbslc/pfbslc.zip

There is no separate GSD file for the SLC-5/04 controller.

If you are using COM Profibus instead of the SST Profibus Configuration software, you may be able to use that GSD file downloaded from SST to perform that configuration.

How to communicate between AB and Siemens on PROFIBUS