I must agree with +McGrath on this, someone who is in the process of conversion is most welcome to make a spiritual communion, however the Sacrament of Holy Communion must be reserved to those in full communion with the Church.
I actually agree as well except that I was taught in DSJ RCIA that receiving communion under mortal sin was itself a mortal sin... but Bishop McGraw does not demand homosexuals confess and repent, but only states the sacraments are not some purity test. I was simply pointing out the inconsistencies with long-held and CURRENTLY taught doctrine when it comes to unrepentant homosexuals receiving the sacraments.