Yeah, most of the "popular" hotels, such as monorail resorts and the Epcot area resorts will have parking restrictions, especially during the peak seasons. They do this to deter people from parking there, taking up space that resort guests that are staying there should be entitled to, and then going to the parks.
However, I will say this, it does all come down to the season, time of day, and attitude of the parking lot guard/attendant. When we've traveled during off peak times we've been waved right into the lot just by having the parking pass and showing photo ID. But other times, we're stopped, asked questions, told to park in a specific area, and giving a parking slip to display on the dash that notes 2-3 hour parking only.
I would recommend that if you have an ADR at GF, by all means, park there, but don't intend on leaving your car there for a long time. If it's a dinner ADR and you will then be going to the park afterwards for only a little while and intend to be back in your car before Wishes, park at GF, but if you're going to be taking the spot up for 5-6 hours, either do valet or figure out another form of transport. It's just kinder to the people who are paying to stay at that resort.
The above especially goes for the Epcot resorts. I can't count how many times I've stayed at BC or BW and had to park way out in the boondocks and then lug my luggage to the room because the parking lot was completely full (and I'm going to assume that there were some visitors there).