Oh finally got it. So what you need to do is:
1. Create a Mod in Launcher.
2. Go to zone_source find mp_mod.zone add to it:
3. Copy tdm.gsc and tdm.csc from share/raw/scripts/mp/gametypes to yourmoddir/scripts/mp/gametypesPHP Code:
scriptparsetree,scripts/mp/gametypes/tdm.gsc
scriptparsetree,scripts/mp/gametypes/tdm.csc
4. Edit your tdm.gsc
5. Build only core and mp mod level
6. Enjoy