Hello Kimberly! I am so happy to see you are planning ahead for your upcoming vacation. I love to take care of all the details at home, and just enjoy every magical minute of my time at Walt Disney World.
Garden Grove is located inside of the Walt Disney World Swan Hotel, you have a few options to reach the restaurant from Disney's Pop Century Resort. You could take a cab, it is about a 7 mile journey and would cost no more than about $15.00. If you would like to use Disney's complimentary transportation, I recommend taking a bus to Downtown Disney, and then transfer to the bus that will take you directly to the Walt Disney World Swan hotel. I would allow about an hour to get to your reservation, it may not take that long but I always like to allow wiggle room.
Your question cut- off but I am assuming the second half is asking how to get to 1900 Park Fare. You would need to take a bus to the Magic Kingdom Park, and then either take the resort monorail, or the boat launch to the Grand Floridian Resort where 1900 Park Fare is located. I would allow about an hour and a half for transportation to this dining location from your resort.
If you have any additional questions I would love to help you out. I hope you have a terrific vacation, filled with memories that will last a lifetime.
Happy Disney Dining,
~Jen