Hi HMT.
That may have been my post that you read about no rep at the airport when I flew to Dubrovnik. If so, may I apologise as I flew from East Midlands, was ridiculously early at the baggage drop off, and the JY rep may not have been there yet.
I have always found J.Y reps to help at both Gatwick and Heathrow, so don't worry. If by any chance you don't see anyone when you arrive (and I think that you are flying EasyJet?), there is always someone from their company who will help you. I hope that helps.
It may also help if you put a post later on, on the "Say Hello to Single Travellers" thread to see if there is anyone else on the forum, travelling from Gatwick, on your date. It doesn't always help, as not everyone uses the forum, but there may be someone who you can get in contact with prior to your departure date, so you may be able to meet up with them at Departures.
I have also found, if it is an airport that you don't know, that reading up about it first online may help. Gatwick is actually a fairly easy airport to find your way around, unlike Heathrow.
I don't know whether you will have a Local Tour Manager (Julia or Monty will be able to let you know nearer to the departure date), in which case you will not meet them until Dubrovnik, but if you have a British Tour Manager, I would imagine that they will be flying with you from Gatwick.
I hope this helps a bit!!