The whole thing is vaguely and noncomittally worded, it promises basically nothing.
Take this bit for example:
taking into account the EULAs of specific games within it
In other words: talk to the individual publishers of each game and get their permission :P At which point GOG’s involvement is almost irrelevant, if you have the publisher’s consent then they might as well give you a copy.
Comedy prediction: SD2 releases overseas, but Australia is used to sell remaining stocks of SD1s for a few years before the SD2 is released here.