I believe he doesn't use the word "Gandhi" but he says a clever/wicked banya [Hindu], whose name will start with "gaaf" or G and will have 6 letters in his name. I think translater assumed it has to be Gandhi.

Then he says when the year of "Kaana Zahuka" start, after that Hazrat Mahdi will appear. I dont know what is "Kaan Zahuka."