where do I find the map bsp files downloaded from the workshop?

Hello

where do I find the bsp map files downloaded? I want to use a map from the workshop in sfm

You have to extract it from the .gma file in the addons folder. Please note that non-HDR maps are not openable in SFM.

Alright thanks! which program can extract .gma files?

Edit: found it in http://forum.facepunch.com/showthread.php?t=1188670&p=36210783#post36210783