Lido ground charts do show K matching the GE imagery.. on those charts it is very definitely marked as not useable/out of service but there is also a relevant NOTAM here:
“May 281500z-UFN.
Establish new TWY K south of RWY 15L/33R fm RWY 33R hldg psn
to
TWY G3 opn and opr for acft mov as flw
- wid : 25M
- sfc : asph
- PCN : 80/F/a/W/T
- lgtd and marked”
FWIW there is also a note in our company documentation about the standard of some of the taxiway lighting and some of the taxiway signage........