Since the demise of Nick GaS, the series is no longer being rerun. Moreover, GaS only had around 60% of the 195 episode run in its rota, including about 10 episodes from the 1987 season with Harvey, although another 12-14 episodes from that period are known to be on the trading circuit.
The two celebrity weeks from the Toffler series were never shown on Nick GaS, although at least one episode from each week is known to be on the trading circuit (including an episode from the Josie Davis/Emily Schulman week which finished as a tie; Josie and Emily ran the Romp together, with any prizes won going to both of their teammates).
Also counts for the UK version - the first two series were made by TVS whose archive ended up in rights hell after the paperwork went missing, and may well never be seen again. However the later series were made by Scottish Television, and Series 3 and 4 were repeated on Challenge starting in 2014.