You need at least two numbers to find a GCF. You probably have that here, but without spaces between the numbers, we can't tell what they are.
The GCF is 6.
The GCF is 9.
The GCF is 4.
The GCF is 30.
50
The GCF is 1.
The GCF is: 1
The GCF is 27.
The GCF is 3.
The GCF is 2.
The GCF is 5.
The GCF of 125, 200 is 25.