Hi Laura! I've just got back from the GSP apts, so will try to answer any questions you have!
You should have a good holiday, I really enjoyed staying there.
To answer some of your questions so far, There is air-conditioning in rooms but if you still want to hire a fan you can ask at reception and they can get you one. I think it was 10 euro for one week and 17.50 euros for two weeks although I'm not absolutely certain as I only had a quick look at the list of things you can hire from reception.
There is a small(ish) clothes airer on your balcony, which overlooks the pool.
Apartments are clean and maid service is five times a week.
No tv's in appts. but again you can hire one from reception if you want!
Entertainment in bar each night, Bingo at 9.30pm and show at 10.30pm.
Supermarket straight over the road, and a bigger hypermarket about three minutes walk to right of appartments.
Restaurants. We ate different one every night, all quite good not anyone in particular I'd recommend but plenty to choose from!
Hope this helps, any other questions just post them here and I'll try to answer them.