Here is the problem with the statement: Apparently god/s exist outside of space and time. If god were to occupy 'space' in an omnipresent fashion then sure, any other being that was also omnipresent would have to occupy the same space. But we are not talking space, we're talking "nothingness". In saying, there is no 'space' to occupy, and thus omnipresence is not only pointless but meaningless to whether one or two can occupy it.
Lg argues that two cannot exist outside of time and space, but the argument should be that even one cannot exist outside of it if it is claimed to be omnipresent. To be omnipresent it must occupy space, to move or do anything time must be a factor. If this being can operate in a realm of nothingness and no time, then 2 can just as easily, as can 3, 4 or 50 gazillion.