Bike tires are typically inflated to a psi (lbs per square inch). A bike tire is a bad example in this context because most are filled pretty high (80-130psi, mine are 90psi). The average car tire is 30-40psi.
I run my dirt bikes trials tire at about 10 psi rear, and 14 front. Mountain bike tubeless 14-25 psi.
So I guess my question was, is a guage measurement above atmospheric pressure? The answer is yes. [0]
"Gauge Pressure:
The pressure of a system above atmospheric pressure."
[0] https://www.boundless.com/physics/textbooks/boundless-physic...