Has anyone used Analytical Hierarchy Process in GIS environment?

Sure ,, in different cases of Environmental analysis we use this type of analysis as follows;- 

1- In geological layers to do risk analysis to avoid environmental-land related disasters

2- In alarming system to adapt with climate change 

3- For sustainable planning of resettlement.  

, it 's intuitive solution using factor discrimination like

rating values within parameters like susceptibility

map approach....

Yes, you can use it by exploring the idrisi gis software