How hard would be to add "Indicator Constraints"

Hello !

While testing GLPK with miplib2017 I noticed that several problems can 
not be handled by GLPK due to having "Indicator Constraints" in the mps 
file.

Looking here 
https://www.gams.com/latest/docs/UG_LanguageFeatures.html#UG_LanguageFeatures_IndicatorConstraints 
for a explanation of it I'm asking if someone else have extended GLPK to 
manage then ? Or if not how hard could be to do it ?

Cheers !