The code GB Form 1099-R reports the rollover from the old Roth 401(k) to the new Roth 401(k). The code G Form 1099-R reports the rollover of the old traditional 401(k) to the new traditional 401(k).
Both of these are "income" in the sense that they must be reported on your tax return even though these rollovers are nontaxable, so including these in Total Income in the income summary is correct. The total of these will be included on Form 1040 line 5a but will be excluded from line 5b. The "ROLLOVER" notation will appear next to the line.
