Those designations aren't going to be of much help, since the database now uses more friendly names vs internal channel designators (as it should be).
If you're traveling on the GSP, then you want to listen to the GSP talkgroups. There are only three main talkgroups for the GSP, which are broken up by North, Central, South. Nothing complicated about it, but you will need to scan the Central and South simulcasts in order to maintain coverage for the stretch of road you're traveling.