hi Anta,
i chkd my ESC today and it is GWS ICS100Li, same as mentioned above by Mr. Sai. i bought it from him only, i think last yr!!!!
go ahead and have one it will help u in adding Gyro to ur heli.
about connection, u have to connect Gyro to Rudder CHof Rx, and connect this ESC 3pin (servo) connector to Gyro. also connect input terminal of ESC to battery and output to tail motor!!! here u have to make some connector so that u can connect battery to 4in1 unit and this ESC!!! kind of Y connector for battery!!!
one very important point, while connecting this ESC to gyro, this ESC have in-built BEC so u have to remove +ve (Middle) pin from ESC servo connector!!!
for more details u can call me!!!!