For the FF(G)1156package, the UCF locations for the GTX Transceivers in the CXT family do not correspond to the same pin locations as they do inthe LXT and SXT families.This answer record compares the CXT and LXT pin diagrams.
Solution
Below is an updated diagram correlating the GTX locations to the corresponding pin names and locations. All parts found in the FF(G)1156 package have been included for comparison.