Congratulations on your DD place at WGHS
I don't know how much help I can be as I don't know your local area well and don't know girls travelling from that way but as the forum is very quiet for this school I thought I'd reply anyway! There is a green bus service from Walsall, if you don't already know, although I am not sure if that is a viable option for you with the logistics of travel from Sandwell in the morning traffic- I think they are pretty close? I have posted the link anyway:https://www.thegreenbus.co.uk/bus_servi ... WG1/13-14/
Looking at the route it starts at Stone Cross, Walsall Road (Hall Green Road) at 7.00 and returns at 17.14
I think from a quick glance at bus timetables that the number 1 bus which goes down the Tettenhall Road and stops outside school now operates all the way from Dudley?-7.30 Dudley bus station arriving @ 8.25 which is a bit of a later start. Again, not sure how feasible that is for you.
Maybe if you contact the school they could pass your contact details on to parents who live nearby so you could try and arrange a travel partner for your DD, which I'm sure would ease your worry