Welcome to the DISboards mariomama!! Don't feel silly asking about pool hopping. There are even some guide books out there that will say you can go to any pool in WDW if you are staying at one of the WDW resorts. However, not true. There is signage at each pool there, that tells you that pool is for only those that are staying at that particualar resort. The only resorts this does not apply to are POR, and POFQ, they are sister resorts and if staying at one of them, you are welcome to go to the other's pool. Same thing with the AllStars I believe. But, that's it. There is a chance that someone will be asked for resort ID while at the pool and if they don't have the correct ID they will be asked to leave.
But, as the previous poster said...the pool at the GF is very nice. In fact, there are people that have tried to pool hop over to that one!!! Hope you have a great trip. And keep stopping by the DIS to get lots of great info.