From my noob point of view, GonZalo lost the connection.
From the logs, I can say this:
***GonZalo's replay***
[00:20:02.96] ••• Damage dealt: 34 to GOT (danie)
[00:20:02.96] ••• GOT (danie) starts turn[00:20:05.00] [GonZaLO] lag?
[00:20:05.00] [GonZaLO] hmm
[00:20:05.00] *** danie is disconnecting due to network drop
[00:20:05.00] *** GOT (danie) forced out by disconnection due to network drop[00:20:05.00] ••• GOT (danie) ends turn; time used: 0.74 sec turn, 0.00 sec retreat
***danie's replay***
[00:20:02.96] ••• GOT (danie) starts turn[00:20:15.74] ••• GOT (danie) fires Paracadute
[00:20:48.24] ••• GOT (danie) fires Balestra
[00:20:52.34] ••• GOT (danie) fires Balestra
[00:21:00.42] ••• GOT (danie) ends turn; time used: 43.98 sec turn, 8.00 sec retreat
[00:21:05.70] ••• Damage dealt: 50 to ZaLO (GonZaLO)
[00:21:05.70] ••• ZaLO (GonZaLO) starts turn
[00:21:05.72] *** GonZaLO is being disconnected due to timeout on receive
[00:21:05.72] *** GonZaLO disconnected due to timeout on receive
[00:21:05.72] *** ZaLO (GonZaLO) forced out by disconnection due to timeout on receivedanie had all the time to send his moves to the host (to complete his turn to be short) and didn't receive GonZalo's messages. If GonZalo quitted, danie would have received those messages at the very moment GonZalo sent them. Moreover I think it is quite clear from the logs that GonZalo had a disconnection (for GonZalo it was danie who lost the connection, instead danie, still connected, can read the real message given from the server, that is, GonZalo simply lost his connection or something other happened and his game didn't receive anything from danie).
GonZalo probably saw danie beginning his turn (in the replay it is seen that danie took the bow) and that waited. Then he wrote the messages that the game shows as sent contemporarily.
In short, I think GonZalo is telling the truth.
Moreover, game's logs cannot be modified in a replay, as far as I know.
And a quitted game shows the "disconnected due to quitting" message, furthermore, from my ragequitter experience
when I quit a game, the replay simply ends, fades, without any particular message. GonZalo's one shows that danie's worms surrendered (lost connection).