Rather unlikely - they have only just managed to get hold of a third weekly slot to expand their Heathrow/Almaty services for next summer, so to then try to find two extra slots to accommodate the Gatwick services to Uralsk and Aktau might be quite tricky.
Apart from anything else, the Gatwick routes are oil-based and Gatwick offers better links than Heathrow to all of the big oil centres like Houston, Dallas, Aberdeen etc.