Hello Nhung!
Welcome to planDisney! Traveling throughout the Parks using the complimentary transportation options is one of the reasons I enjoy staying at a Walt Disney World Resort Hotel. I hate driving and enjoy having options where I can relax and let someone else do the work.
Disney's Grand Floridian Resort & Spa has two direct transportation options to get anywhere and they are the
monorail and
bus. To get to Disney's Hollywood Studios from this Resort, you can only use the bus option at this time. The monorail to EPCOT from this Resort deposits you at the main entrance to EPCOT which does not have a
Disney Skyliner station. If you wish to enter EPCOT and walk to the International Gateway entrance, you could jump on the Disney Skyliner and head to Disney's Hollywood Studios. However, entrance into EPCOT and Disney's Hollywood Studios on the same day would require a ticket with a
Park Hopper Option or that you be an
Annual Passholder. Annual Passholders have to make
theme park reservations for the first park they visit that day unless it is a
good-to-go day. Another option to consider if you wish not to take the bus is to pay for the luxury of the
Minnie Van Service via the Lyft app. These vehicles are operated by Cast Members and up to two car seats can be provided if you have little ones. You can also purchase a ride on your preferred ride-share service if you like. Either way, make sure to get a
Jack-Jack's Num Num Cookie and learn some fashion secrets from
Edna Mode!
I hope that this helps and you have a magical time!
Happy Planning!
-Nimmy