I think we all agree that the MS magnet is further away than the HGC.
I have talked to several parents, that live near me so we had the same schools/drives, who have quoted travel times that were not typical for what I found.
They didn't realize they could use any magnet bus stop in the county.
I don't know where you live but my guess is that by using part of your own commute to put your DC on the bus closer to either school, that you could have cut your door to door times by 1/3.
Well, except on days that it was raining.
"Our zones HGC was close to an hour away by bus each way. The MS magnet was close to 2."