Fellow WDW vet here. You have to put the WDW mentality out of your mind for DL. There really isn't such a thing as "Disney Transportation" around the
Disneyland resort, like you have at WDW. Unlike at WDW, everything at DL is very compact and all walking distance. That is one of the things we like best about going to DLR. You can be anywhere on property in a walk of 10 minutes or less. The distance between the parks is just a plaza that is shorter than the distance it takes to walk from the park bus stop to the gate at most WDW parks. As far as the distance from the resorts, the Grand Californian has a gate directly into California Adventure at the hotel, and the walk out the front to DL is short. The Disneyland Hotel is a nice walk through downtown Disney to get to the gates. I have heard DL people complain it is a little far, but by WDW standards it is nothing. The Disneyland Hotel is at one end of DTD, and the parks are at the other. I haven't made the walk from the Contemporary to MK at WDW, but I would guess it is a similar distance- it is around a 5 to 10 minute walk. Paradise Pier, is the longest, and just slightly more than from the Disneyland Hotel. I haven't been to that resort, but I think that one does involve crossing a street, unlike the other two, which go direct or straight through the downtown Disney walking paths. The Monorail at DLR is more of a ride, than real transportation. It is closest to the Disneyland Hotel, but as the photo shows, you still have to walk into Downtown Disney a little ways to the station. It drops you off in Tommorowland. It can take longer to get in line and wait for the monorail, than just to walk to the parks from the resort. We have taken it back from Tomorrowland when we were really tired, or just wanted to experience the monorail- but DH has gotten on to me because at certain times of day, you will wait in line for the monorail longer than it would have taken you to just walk back (other times you might get it quickly). Also, it is great if you are already in Tomorrowland, but if you were over in California Adventure, it would take you about as much time to walk over to the monorail as it would to just walk back to the Disneyland Hotel. As you can see from the photo, the monorail wouldn't be Grand Californian transportation at all, because the stop is about as far from the Grand Californian on one side, as the park is on the other.