Offering a GFE service and actually being a GFE are two different things. There are many unsavoury escorts and agents who will advertise this but when you get there, it's a completely different story.
To me, being a GFE is not only offering a more personal kind of service by kissing, etc, it is more in the provider's attitude. One can provide these services but if their attitude sucks or they seem distant, then it really isn't a true "girlfriend experience".
I have noticed in my years as an SP that it is not entirely about looks or what services are given, it is attitude and personality. If you have a good outlook towards your customers, you will go further in this business.