Here are some details about the size of each area:
Gila Desert:
- The Gila Desert covers an area of approximately 250,000 square kilometers (97,000 square miles).
- It is the largest desert in the United States by area.
Death Valley:
- Death Valley National Park covers an area of approximately 13,628 square kilometers (5,262 square miles).
- It is the largest national park in the contiguous United States outside of Alaska.
Based on these figures, the Gila Desert is significantly larger than Death Valley.