Never seen this at LGW (which is my second most used airport).
Have however had something similar when arriving at AMS, where G9 is the usual gate. We were towed to a gate on the D pier (I think) which was a very cumbersome process. I guess aircraft with a big wingspan are not allowed to drive unassisted on that part of the apron. Of course this was not a gate with an upper airbridge so we (flying in J) had to come down the F cabin stairs and then a long walk to bagage belt 22 where no bags had arrived yet. But I digress.....Where is 55G? Probably closer to the lounge than 110..