You can edit it. (ASK it first if you want) You can share it (ASK it first if you want) You can use it on your server. Dont change the map name. Dont say it yours.
Correct me if I`m wrong, but you used to make better maps (par example: de_deserttown, awp_india, ka_sectorx and others). The current map looks a bit dodgy but mostly alright. Playable - I'd say.