It's his polite way of saying Good Fucking Luck.
By the way, don't confuse “Godspeed” with the old phrase “good speed.” (The word “good” was sometimes spelled “god” in Old English and Middle English.) The expression “good speed” is a separate usage, in which “speed” in the old sense of success was coupled with adjectives like “good” or “evil.”
Good. Use their weapon against them. Akido.
Likely donation requests at grocery checkout too.