Well, here it is.
Gal 2:7 But contrariwise, when they saw that the gospel of the uncircumcision was committed unto me, as [the gospel] of the circumcision [was] unto Peter;
Gal 2:8 (For he that wrought effectually in Peter to the apostleship of the circumcision, the same was mighty in me toward the Gentiles:)
Gal 2:9 And when James, Cephas, and John, who seemed to be pillars, perceived the grace that was given unto me, they gave to me and Barnabas the right hands of fellowship; that we [should go] unto the heathen, and they unto the circumcision.
And lets not forget that James and the Jerusalem church were still offering sacrifices in the temple and requiring circumcision when Paul made his last trip there.
James himself talked Paul into going to the temple to offr sacrifices for men with vows on their heads.
There is no indication that the entire Jerusalem church was offering sacrifices in the temple or requiring circumcision. There were some who were pushing these things, but it was not all of the church in Jerusalem.
Also, Paul does not say there are two gospels here in Galatians. He is saying that taking the Gospel to the uncircumcised was committed to him, and that taking the Gospel to the circumcised was committed to Peter.