** Guzman y Gomez GYG.AX soars as much as 26.2% to A$34.065; marks record intraday percent gain
** Stock hits highest since March 26
** Mexican-themed fast food chain announces A$100 mln ($65.8 mln) share buyback
** Posts Q1 sales of A$305.5 mln, a 17.4% y/y rise
** Expects to open 32 new restaurants - 20 franchised restaurants, 12 corporate restaurants - in Australia in FY26
** YTD, GYG falls 30.4%
($1 = A$1.5188)
(Reporting by Keshav Singh Chundawat in Bengaluru)
((Keshav.singhchundawat@thomsonreuters.com))