Tip needed: How to surround a selection with bracket

[Proful]

G   = "goto_file_end"

ma" is helpful to select "goto_file_end"
After that selection I want to wrap with bracket ["goto_file_end"]. How to achieve it?

G   = ["goto_file_end"]

[CptPotato]

Do you mean ms[ / ms] to surround the selection with []?

[Proful]

Thank you!