I have made a server for GTA SA-MP but it's need's more work on it but i have made a beta to try out my server you should go have a look
on sa-mp:
HostName: Artois 0.2.2
Address: 192.168.0.100:44556
Mode: Ventura's DM
Map: San Andreas
Things u will need are
SA-MP O.22 Download from WWW.SA-MP.COM