sure- it's very fluent/colloquial.
it means that someone just asked the speaker a question and they do not know how to respond. they need to take a moment to research or find the answer, and then they will come back to the person asking the question with a response.
I thought a good translation would be : Peux-je retourner à votre question dans un instant?
Please have a look at the on-site dictionary entry for get back to, as well - you'll arrive at the general entry for get, but the more specific keyword search will give you a reasonable list of links to previous discussions: