 During GHA's spell in the Premiership, current Scotland Internationals Johnnie Beattie and John Barclay were among those to be allocated to play for them.The following players gained either Under 20 or Under 21 Age Grade International honours whilst playing senior rugby at GHA.Under 21 (Age group was disbanded after 2006 season)

Under 20 (Age group replaced Under 21s from 2007 onwards)