Those predicted gains under Goals vary by Athlete type and IR setting. Try selecting different entries and watch what changes.
Not to dash your hopes 
but it’s a theoretical value you could obtain if you able to handle projected TL hours and intensity over time compared to where you’re at now.
Reality lies somewhere in between. 
By the time I got through Build phase my projected number was pretty close.
I believe the prediction is based on x% improvement per week for current ramp rate.
At some point you’ll start hitting a limit of what you can handle and attain during a particular training block. You may end up dialing things down or take more rest days in between or possibly insert recovery week (off-season setting) before changing back to desired IR. In this respect the number is a moving target.
I didn’t do any kind of gym work with weights during that time but I was exercising with resistance bands and kettlebell on my rest days (usually Monday). Just basic stuff.