Hi all,
What does the “G” stand for on airport runway d
iagrams?
Thanks!
I would assume it stands for “grooved” runway. Meaning that the braking coefficient would be a bit better if wet, not quite as good as a dry runway but some aircraft types are approved to use different performance figures if the runway is grooved.
A Internet search for LIDO chart legend gives the answer:

Source: Understand Lido Charts | PDF | Airport | Aviation Safety