Hi Carl,
You've brought up a very interesting subject. Thank you.
To be honest, I've never really paid much attention to how the numbers were laid out as one who just relied upon whatever device I was working with to deal with it. Never was a boy scout.
I looked this up to see what the master (Google) had to say and I learned that the correct way is the way that those you are dealing with work the rules. For example, punctuation in the US has quotation marks AFTER punctuation ("My gosh," he said.) whereas in the UK, it's after ("My gosh", he said.). Both are correct but depending on where you are one of them is wrong.
I did find this site: that breaks this down quite a bit:
Symbols for degrees, minutes and seconds
However, I strongly suggest you let Adobe know about your needs here:
Adobe Bridge Feedback
Let them know why their approach is not recommended and why it should be changed. To whom would this make a difference.
Please understand that Bridge has had it this way for at least 15 years and as such, might not be so inclined to just change how it displays metadata. But, if you make a good argument, it could be changed. At a minimum, I suggest you ask for a preference for coordinates to be presented. This would be no different than asking for time with a 12 hour clock or a 24 hour clock. Or, using Imperial measurements or metric. All are valid, some conditions control which ones.