At TS 6 (2 Cor 2.3) GA 912 is reported as having reading 1/2. in fact it has the sonderlesarten 4, which links it to part of von Soden's Kc group.
This TS is a distinctive reading of the group also shared with a couple of other "interesting" mss. (e.g. 61).
The rest of Kc tends to read the previous sonderlesarten 3.

The text can be seen on the top right column here:
https://ntvmr.uni-muenster.de/manuscript-workspace?docID=30912&pageID=2060