In the song "Gimme a Pigfoot" (by Wesley Wilson), sung by Bessie
Smith, Billie Holiday, and Nina Simone, one of the lines is "send me a
gate".  (gimme a pigfoot, and a bottle of beer, send me a gate, I
don't care).
What does this mean??  I can't find any other examples of its use.  My
only theory is that it's referring to prison, but I can't find any
confirmation of that.  Please help!  Or I'll have to go back to
singing along - "send me agape".  I kind of like that better anyway

Could this be it?

give (someone) the gate Slang.

   1. To discharge from a job.
   2. To reject or jilt.

Okay, when I read your question, the gate thing immediately brought to
my mind "Give me a safe passage". I knew I saw it on TV or something.
Then I remembered that I read it in a book. I looked in Google's book
search(Google is the best!)and this is an answer:

Good Morning, Killer
by April Smith - Fiction - 2004 - 380 pages
Page 30 - ?I'm just looking for safe passage, hon?' ?Meaning? ...
?Give me safe passage.'
And you'd say, ?Okay.' And he'd say, ?I know you're smoking cigarettes and ...

Anyway, to make a long story short, in this story I read, it means
'hear me out'. gate/ passage.... could it mean the same thing? I hope
this helps!

Faither

Could it really be "Send me a gait (or agait)?" Meaning: Send me
walking, a euphemism for "Hit the road, jack."

Just a thought!