Feb 17 (Reuters) - Great Panther Silver Ltd GPR.TO :
* Great Panther Silver and Vista Gold extend due date for next option payment
on Guadalupe de los Reyes project
* Great Panther Silver and Vista have agreed to extend the date of the current
US$1.5 million option payment from February 15 to February 25, 2016
* Source text for Eikon Further company coverage GPR.TO