How do you shift the root(G) notes of a g major scale to the root note of a c major scale?

Question

I need to know to help me improvise when I play jazz guitar. A formula would help(if there is one).

Answer 1

G+perfect 4th=c

G=C

A=D

B=E

C=F

D=G

E=A

F#=B

G=C