In the UK, at least, since the majority of routes are likely to be North/South, I think a GC option would be of limited value and I personally, don't see the need for it. However, I can understand only too well, the desire of others to have this option, so, how about:-
1. Show one or the other – user selectable option in Settings, but default should be RL;
2. When selected, show the RL route in magenta, as currently;
3. When selected, show the GC route in blue;
I know that displaying a route line in a colour other than magenta it is a radical departure from the norm, but at least there could be no mistaking which is being displayed.
Tim – In the case of someone loading a route created by another, would it be possible to check each user's setting and convert the downloaded route if necessary, or would this just be a coding nightmare?
Samsung Galaxy Tab A8 – Android 10.0 & SD 22.214.171.12480
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PC – Windows 10 (Home Ed) Version 2004, Build 19041.329 & SD 3.14.1