From the Disney Parks Blog:
We have some exciting news to share this holiday weekend. Starting tomorrow morning, Sunday, July 4, the Disney California Adventure park gate at Disney’s Grand Californian Hotel & Spa will open at 9:00 a.m. exclusively for Disneyland Resort Hotel guests so they can get in line for Disney’s FASTPASS tickets to each evening’s performances of “World of Color.” The Disneyland Resort hotels include the Disneyland Hotel, Disney’s Paradise Pier Hotel and Disney’s Grand Californian Hotel & Spa. The main entrance will open, as scheduled, at 9:30 a.m. for all other day guests.
While Park hours may vary, please check disneyland.com for the most up-to-date schedule. The early access for Disneyland Resort Hotel guests at the Disney California Adventure park gate at Disney’s Grand Californian Hotel & Spa will be 30 minutes earlier than the opening listed for main entrance.
This is a great benefit for guests staying at Disneyland Resort Hotels, but guests not staying at the hotels will still have access to Disney’s FASTPASS tickets for “World of Color.