Meeting took place at pontiff’s Vatican residence on Oct. 12
Pope Francis approved doctrine office's document on March 25
Pontiff vehemently opposed marriage equality in native Argentina
Retired pontiff resigned in 2013
Md.-based New Ways Ministry released declaration on Monday
Decree declares God cannot bless 'sin'
Catholic advocacy groups welcome pontiff's comments.
Private audience at Vatican considered rebuke to anti-LGBT church leaders
