I have a g-maj 2. Do this. FSB midi out to the Eleven, midi Thru (or out) from Eleven to the Gmaj in.
Preset 1 on the FCB1010. I assume you already have your program/tone on the Eleven preset 1(as you said that you've used it with it). Say it's distortion and you want a little delay and reverb. When you press 1 on the FSB, the Eleven should go to 1 and the Gmaj should go to 1 as well. This is the 1:1 default that midi devices have. You can switch away from that, but I wouldn't, you don't need to.
On the gmaj, dial up the effects that you want for preset 1 and save. Do the same for all of your presets 1-20 or whatever. Just press the FSB number 2 (as example) dial in the sounds that you want and save. You don't have to go into midi at all.
The neat thing with the FSB is that you can assign the pedal CC's to different midi numbers, 7 and 21 are mine (randomly). On the Gmaj, you can go into midi setup and program delay length and/or level to be controlled by CC 7. So you can dial up or down the amount of delay in your sound on the fly.