I was able to port it, along with a night version. Doesn't look quite as nice as the BMS version but it should work. I took out the weapon placements as the game lets you spawn them anyway.

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=3012887511

thanks, gmod community is really gonna love this map, also night time would look so great

The branch of the source engine that Gmod runs on doesn't support the newer light entities present in Black Mesa that I use to create some of the nice shadows present in the map. The map itself should be capable of being ported, just without the fancy shadows and god rays. The models used in the map will also have to be ported.

Might take a little while, but I'll have a look into porting it when I get more time.

could you upload this on gmod?