Is it true of false that the Gobi dessert is Asia's largest dessert

This is indeed a true statement.

The Gobi Desert is the largest desert in Asia and is the fifth largest desert on the planet. This massive desert covers an area of 500,000 square miles and receives roughly 4 inches of rain per year

yes, it's true

Explanation:

The Gobi Desert is the largest desert in Asia, spanning over 1,600 km (1,000 miles) over China and Mongolia, and the 5th largest desert in the world.