FREE QUEST BAR WITH GNC IN-STORE PURCHASE OF $25 OR MORE Written by Clark Pagaduan on November 4, 2015 in Featured Share This: Tweet Share Share Pin It Free Quest Bar with Any In-Store Purchase of $25 or More! Valid @ participating GNC stores thru Monday, 11/9/15. Single bars only. Show code 27962 @ checkout. Written by: Clark Pagaduan on November 4, 2015.