Configure your map
Go to resources/fivem-map-skater or resources/fivem-map-hipster.
Then open __resource.lua and change gameTypes from fivem to fs_freemode
resource_type 'map' { gameTypes = { fs_freemode = true } }
map 'map.lua'
resource_type 'map' { gameTypes = { fs_freemode = true } }
map 'map.lua'
Updated less than a minute ago