It's a 7year old thread. It took some resolve to go through the long winded explanation by the training capt only to find not to be wholely true.
Question 9: When does the groundspeed mini function cause problems and what can I do about it?
Answer: The function causes problems typically at 1500ʼ above the runway on a very windy day when the wind can be enormous compared to the Tower Wind. If for example on RW 08 with a VAPP of 125kts and the Tower Wind is 080/15 but the instantaneous wind is 080/70 (as can happen) then 55 knots can be added to VAPP making VAPP TARGET 180kts. This can be above the flap limiting speed for Config Full (177kts) and give an enormously high approach speed. However as you approach the ground that speed will progressively decrease as the headwind component (and ʻgustʼ) decreases. There are 2 ways to overcome this. One is to enter an artificially high Tower Wind and thereby reduce the ʻgustʼ and subsequent VAPP TARGET or the more common method is to immediately select a speed (say 160kts) and wait for the gust to die down. As soon as it has done so, you manage the speed again and the VAPP TARGET will be sensible. Dead easy!
The aerobatics suggested by him are based on an erroneous assumption and are not necessary. GS mini cannot exceed speed limits at either end of the scale. It will not drop speed below Vapp nor will it increase beyond VFE-5 and if doing decelerated approach then flap2 or 3 VFE next. The very purpose of GS mini is to cater for gusts throughout the approach and not just near the ground. All you need to do is just leave it alone and let it do it's job.
As far as the OP hypothetical case of being hauled up on account of GS mini speed exceedence where is the exceedence when the Vapp itself has increased? It can be corroborated from other parameters such as ground speed, winds etc.