The text of Nick Gibb's recent Key Note address to Grammar School Heads Association has been posted on the DfE website
Among other things, he comments that:
"Last year, 55 per cent achieved five or more GCSEs at grades A*-C including English and maths. But the free school meal figure was just 31 per cent – and that gap of 24 percentage points has remained stubbornly constant over recent years.
"It is a disparity in outcome that we want closed – or at the very least brought closer to the 2.4 per cent gap that grammar schools have achieved – for the very simple reason that reducing the attainment gap between pupils from rich and poor backgrounds is an absolutely key moral objective of the Coalition Government in general, and of Michael Gove in particular."
The figures on which he bases this statement are mostly available here
If I've done my sums correctly, the two fully selective authorities of Kent and Buckinghamshire have attainment gaps of 32 and 36 percentage points respectively. In both areas the free school meal figure is below the national average?