Convert .bsp/.map file to blender file

I want to use this map in Blender (Quake Live Map):

-delete the skybox and entities (maybe in GTKradiant)
-export to file which i can open in Blender.

#30 Euro for this map to open in Blender
#80 Euro for teaching me how to do it (Chat/Teamspeak/Discord - German & English)


https://www.file-upload.net/download-14950796/leviathan.aas.html
https://www.file-upload.net/download-14950797/leviathan.bsp.html