It is probably true - and it certainly would not bother any GB pilot. There is something of a precedent in the current situation at GO/easyJet. For reasons of practicality there has been an initial period of parallel operations while SOPs etc are firmed up prior to full integration of the pilot workforce. At some stage there will be a time (I have heard March mentioned) where all pilots will be flying to the same hymnsheet and the same procedures. Presumably a similar situation would exist at BA/GB (or is it GB/BA?). The difference in this case is that GB SOPs are already virtually identical to BAs and vice versa so I cannot imagine any real snags. I just hope the situation never arises!
There are far bigger fish for both GB and BA to fry right now, and any takeover by BA of GB can only be an extremely unwelcome distraction at a time when all our minds should be focussed else where - like the forthcoming Gulf War or the threat from the Low Cost Airlines.