ashe It’s the AT+GTOUT command… The tracker has one internal CUT relay.
So I think this is the command for disabling the relay:
AT+GTOUT=[password],0,0,0,0,,,,,,,,,,[serial no.]$
And this one for enabling it:
AT+GTOUT=[password],0,0,0,1,,,,,,,,,,[serial no.]$
Ideally would be used for enabling / disabling the engine or fuel pump..
You could also check page 21 on following link:
https://www.eddywireless.com/yahoo_site_admin/assets/docs/GMT100_Track_Air_Interface_Protocol_V105_decrypted.99183956.pdf