I'm no expert Z but here's my take on what you might expect:
Very open minded = the lady provides many options for your enjoyment but (as with everything in life) there's a price. Eg. expect an up-charge for Greek.
Party Girl = probably the lady enjoys marijuana (420 friendly) and she may also be into other recreational drugs.
GFE = Girl Friendly Experience - it could/should mean that she's into kissing, cuddling - ie more than just a quickie. But it is an overused term so may just be good advertising to say but not necessarily deliver.
My advice is to simply ask the lady.