Just to add to previous replies on this.
I've regularly been given VFR transits overhead Gatwick when returning to Redhill; although I don't ask if its clearly very busy on frequency as its probably a waste of time for everyone concerned. Usually you end up doing a few orbits whilst waiting for the crossing clearance - but the view is always good.
The other routing I've had is up the eastern side of the zone, remaining east of East Grinstead as a bit of a shortcut from the MAY area going back to Redhill.
Nothing but a big
for the Gatwick controllers, they've always seemed very friendly to GA based on my (albeit slightly limited) experience.
Paul.