Erm, the gmod engine couldn't handle this.

how to actually import map from Cities Skylines to Source engine?

You cant folks :)

gmod maps are made in the 'hammer editor' and this hammer editor has a limit at which you cannot build out of. This map is way to big for this hammer grid and the only way you could fit this map into the grid is if you shrunk it to about 1/5 of its size; maybe even 1/6.

Im sorry this is not possible

引用自 Cat Bond 007：

and what about if we shrunk every city of gta san andreas

What do you mean by "every city"? GTA SA has one city wtf.

引用自 Cat Bond 007：

and what about if we shrunk every city of gta san andreas

There is map that is bit similar to GTA V:
https://steamproxy.com/sharedfiles/filedetails/?id=1206713841&searchtext=rp_+new+york
You can also enter inside the buildings.

pls

I mean, we got gm_bigcity but that isnt big enough, maybe atleast popular locations of san andreas? like mount chiliad, franklin's house, michael's house (already is a map), vespucci beach, etc.
but not the whole map, source probably can't handle it

引用自 laura：

Erm, the gmod engine couldn't handle this.

you mean source engine

wait, someone tried to put the GTA V map into gmod?

would the GTA:SA map be too big?